Rexnord Glossary

Industry specific terminology at your fingertips
 
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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Accumulation - category: FlatTop Chain
There are two types: In-Line Accumulation occurs when products back up and become stationary on the conveyor chain as it continues to slide underneath them. Off-Line Accumulators hold the products off to the side, out of the main flow, until the line clears.
Accumulation Conveyor - category: FlatTop Chain
Any conveyor designed to permit accumulation of packages, objects, or carriers. May be roller, live roller, roller slat, belt, vibrating, power-and-free, or tow conveyors. See Minimum pressure accumulation conveyor and Zero pressure accumulation conveyor.
Accumulation Table - category: FlatTop Chain
A special conveyor that holds excess product during line stoppages. It may utilize TableTop® Chain, MatTop® Chain, wire belt, fabric belt, etc.
Acetal - category: FlatTop Chain
Any organic compound formed by adding alcohol molecules to aldehyde molecules. This is one of the most common materials for molding TableTop and MatTop Chains
Alignment - category: Coupling
A condition where the axis or center lines of two shafts are in line or coaxial.
Angular Misalignment - category: Coupling
A condition where two shafts are not parallel. The axis or center lines of two shafts intersect at angles to each other.
ANSI - category: Industrial Chain
American standard chains are covered by ISO 606, ANSI B29.1 and DIN 8188. The pitch sizes covered by this standard are 1/4 to 3 inch pitch. American standard chains have a smaller pin diameter than their European standard equivalent. American standard chains are normally referred to under the ANSI standard numbering system, for example a 1/2 inch pitch duplex chain would be, ANSI 40-2. The ANSI numbering system works as follows:
  • The first number is the pitch size in 1/8 inch, ie 4/8 = 1/2 inch pitch
  • The second number refers to the chain being a roller chain, 0 = roller chain. A 5 replacing the 0 would indicate a bush chain
  • The suffix, as with European standard chain, refers to the number of strands in the chain, that is 2 = duplex chain
Antimicrobial - category: FlatTop Chain
An additive homogeneously blended into the plastic of our Rex® MatTop® Chains that inhibits the growth of bacteria and other microbes.
Apron Conveyor - category: Conveyor
Apron conveyors move bulk material on a belt of thick steel trays or pan in an enclosed frame. Chains along both ends of the feeder help move the trays along the conveying area.
ASME - category: Industrial Chain
ASME, founded as the American Society of Mechanical Engineers, is a professional association that promotes the art, science and practice of multidisciplinary engineering and allied sciences around the globe. They are involved in continuing education, training and professional development, codes and standards, research, conferences and publications, government relations and other forms of outreach.
Assembled-to-Width - category: FlatTop Chain
Rex MatTop Chain consisting of bricked links available in almost any width on a Made-To-Order (MTO) basis. Standard widths do not require link cutting and are usually available in either 3" or 6" increments (depending on the chain series). Nonstandard widths require cutting, which increases the cost of the chain.
Attachments - category: Industrial Chain
Attachments are defined by dimensional characteristics from a standard table or in the case of special attachments by a precisely detailed drawing. The chain identifying code also includes the attachment code and specifies how the attachment is to be put into position, how many holes it must have, etc. as follows:
  • A = for single-sided bent attachment
  • M = for single-sided vertical attachment
K = for double-sided bent attachment
MK = for double-sided vertical attachment
1 = for single-holed attachment
2 = for double-holed attachment
3 = for triple-holed attachment
01 = for attachment every pitch
02 = for attachment every 2 pitches
10 = for attachment every 10 pitches
0X = for attachment every X pitches
Other special attachments are available. Special attachments or those which depart from the catalog norm, are identified with the same classification criteria but should also include a drawing number.
Austenitic - category: FlatTop Chain
Grades of stainless steel that offer very good corrosion resistance, are work-hardenable, and are relatively non-magnetic compared to ferritic stainless and carbon steels. Austenitic steels provide longer wear life and better overall performance compared to lower grades of stainless steel.
Axial Misalignment - category: Coupling
This is a lengthening of a shaft. It could be caused by thermal changes in environment or induced through the use of a sliding coupling
Axial Clearance - category: Bearing
Axial Clearance is the amount of axial movement of the rings without imparting an axial load
Axial Expansion - category: Coupling
This is a lengthening of a shaft. It could be caused by thermal changes in environment or induced through the use of a sliding coupling.
Axial Load - category: Bearing
Axial or thrust loads are applied parallel to the axis of rotation.
Axis - category: Gear
An axis is an imaginary straight line that passes through the center of an object. A gear may have an opening at its axis (bore) through which a shaft can be inserted.
Babbitt - category: Bearing
Babbitt is type of metallic material used for plain bearings. It is a lead and tin mixture which is relatively soft and for this reason minimizes the danger of scoring or damage to the shaft.
Backlash - category: Coupling
The distance between the center point of two bolt holes 180 degrees apart.
Backstop - category: Gear
Backstops are mechanical devices designed to allow free rotation of a shaft in only one direction and prevents reverse rotation.
Bed - category: Conveyor
A bed is the part of a conveyor upon which the load rests or slides while being conveyed.
Bed - category: FlatTop Chain
That part of a conveyor upon which the load rests or slides while being conveyed.
Belt Conveyor - category: Conveyor, Industrial Chain
An endless fabric, rubber, plastic, leather, or metal belt operating over suitable drive, tail end and bend terminals and over belt idlers or slider bed for handling bulk materials, packages, or objects placed directly upon the belt.
Bevel - category: FlatTop Chain
The angled thrust surface of a side-flexing chain link that holds the chain down in the corners (used with beveled corner wear strips).
Bevel Gearing - category: Gear
Bevel gears are a type of gear with cone-shaped teeth cut at an angle. They are most commonly used to transmit power between shafts that intersect at a 90 degree angle. They are more costly and are not able to transmit as much torque, per size, as a helical gear set.
Bindicator - category: Conveyor
A Bindicator is a device used in an elevator to detect the presence or absence of material. It will send a signal to the control room when material builds up in the boot indicating action need to take place to avoid unnecessary wear on the elevator components.
Block Chain - category: Industrial Chain
A block chain, also called a “bar-link” or “block-and-bar” chain is a mechanical drive chain. Block chain is composed of side plates where each plate straddles one end of a block and is connected to the block with a pin going through a hole at one end of the block. Block chain is heavy and is less efficient rolling over sprockets in compared to a standard roller chain; however, it has advantages in specific applications where fixtures or attachments need to be attached to the chain.
Bolt Hole Circle - category: Coupling
A jarring reaction when starting or reversing a load, caused by play in a coupling.
Bucket Elevator - category: Conveyor
A bucket elevator is a mechanism for moving flow able bulk material using buckets attached to belts or chains based on a standardized design format to lift material vertically.
Bushing - category: Industrial Chain
In chain, a bushing is a renewable liner fixed in the barrel of a link, or center link, to provide an improved bearing surface. A hollow cylinder used to space the sidebars and provide a bearing surface for the chain pin, and on which the rollers may or may not be mounted.
C –face Motor - category: Gear
A "C-Face" motor is a common American mechanical standard designed with a rugged flange on the face of the motor for mounting purposes. The weight of the motor is supported by the flange, which is most commonly attached to a gearbox. The flange is strong enough to cantilever the motor. Naturally, this method is not useful for large motors, and is rarely used over 20 horsepower. C-Face motors are designed to very tight specification.
Capacity - category: Conveyor, Industrial Chain
The number of pieces of a defined size, volume of material that can be handled by a conveyor in a unit of time.
Carbon Steel - category: FlatTop Chain
Steel in which the main allowing element is carbon. The term carbon steel may also be used in reference to steel which is not stainless steel. Carbon steel is not recommended in wet applications as the material will corrode.
Case Hardening - category: Industrial Chain
Case hardening is a generic term covering several heat treatment processes that change the chemical composition of the surface layer of the steel and then transforms the microstructure to get a very hard surface with a ductile core.
Cement Clinker - category: Conveyor
In the manufacture of Portland cement, clinker is lumps or nodules, usually 3–25 mm in diameter, produced by sintering limestone and alumino-silicate (clay) during the cement kiln stage.
Centrifugal Discharge Elevator - category: Conveyor
A centrifugal discharge elevator typically feeds the bucks from the in-feed chute in the boot section and conveys it to the top of the elevator and discharges the material centrifugally down the chute. To accomplish this, these elevators operate at a higher speed than Gravity discharge elevators, roughly 34 RPM at the head shaft. It is recommended when the material that is being conveyed is sized from a fine material, such as finish cement, up to material that is 2 inches in diameter such as rock or Cement clinker.
C-Face Motor - category: Gear
A "C-Face" motor is a common American mechanical standard designed with a rugged flange on the face of the motor for mounting purposes. The weight of the motor is supported by the flange, which is most commonly attached to a gearbox. The flange is strong enough to cantilever the motor. Naturally, this method is not useful for large motors, and is rarely used over 50 horsepower. C-Face motors are designed to very tight specification.
Chain Conveyor - category: Industrial Chain
A chain conveyor is any type of conveyor in which one or more chains act as the conveying elements.
Chain Conveyor - category: Conveyor
A chain conveyor is any type of conveyor in which one or more chains act as the conveying element. The load is positioned on the chains and the friction pulls the load forward.
Chain Drive - category: Conveyor, Industrial Chain
A power transmission device employing a drive chain and sprockets.
Chain Elongation - category: Industrial Chain
When the chain articulates over the sprocket, the pin and bush rotate against each other, causing slight wear on the outside of the pin and inside of the bush. This is what leads to chain elongation. Measuring or tracking elongation can be an effective tool to help monitor chain wear. As chain elongation develops, the chain may creep up on the sprocket teeth until it starts jumping sprocket teeth and can no longer engage with the sprocket.
Chain Materials - category: FlatTop Chain
AS - Anti-Static (Acetal)
CR - Extreme Chemical Resistant (fluorinated polymer)
D - Plain Acetal
WD - White Plain Acetal
ESD - Electrostatic Dissipative (polypropylene)
FR - Flame Retardant (polyester)
HP - High Performance (acetal)
WHP - White High Performance (acetal)
HS - Heat Stabilized (nylon)
HT - High Temperature (polypropylene)
WHT - White High Temperature (polypropylene)
RHT - Red High Temperature (polypropylene)
KHT - Khaki High Temperature (polypropylene)
LF - Low Friction (acetal)
WLF - White Low Friction (acetal)
WLT - White Low Temperature (polyethylene)
BLT - Blue Low Temperature (polyethylene)
MR - Melt Resistant (nylon)
WSM - White Special Material (cut resistant acetal)
BSM - Black Special Material (cut resistant acetal)
P - Chemical Resistant (polyester)
UHS - Ultra High Strength (polypropylene composite)
DUV - Ultraviolet Resistant (acetal)
LUV - Low Temperature Ultraviolet Resistant (polyethylene)
HUV - High Temperature Ultraviolet Resistant (polypropylene)
BWR - Black Wear Resistant (nylon composite)
S - Carbon Steel
SS - Stainless Steel
SSB - Stainless Steel Low Magnetic
TC - Tough Composite (impact-modified composite)
WHA - White High Temperature Antimicrobial (polypropylene)
BHA - Blue High Temperature Antimicrobial (polypropylene)
WLA - White Low Temperature Antimicrobial (polyethylene)
BLA - Blue Low Temperature Antimicrobial (polyethylene)
WSA - White Special Antimicrobial (cut resistant acetal)
GSA - Grey Special Antimicrobial (cut resistant acetal)
GLD - Detectable Grey Low Temperature Antimicrobial (polyethylene)
RLD - Detectable Red Low Temperature Antimicrobial (polyethylene)
THD - Detectable Tan High Temperature Antimicrobial (polypropylene)
Chain Tension - category: Industrial Chain
The actual pull existing at any point in a conveyor chain.
Chain Tension - category: FlatTop Chain
The actual pull existing at any point in a conveyor chain. Chain calculations are often used to ensure a specific chain can handle a specific conveyor application.
Class I Application - category: FlatTop Chain
Explosion Proof Environments
Class II Application - category: FlatTop Chain
Nuisance Static Environments
Clearance Fit - category: Coupling
This is the most popular fit because of its ease of installation. The bore size is larger than the shaft. It maintains its position on the shaft through the use of a key and set screw. Also called a slip fit.
Coefficient of Friction - category: FlatTop Chain, Industrial Chain
A numerical expression of the ratio between the force of contact existing between two surfaces and the resistant force tending to oppose the motion of one with respect to the other. The coefficient of friction is used in determining the power necessary to drive a machine; to determine the slope angles used in hoppers, bins, chutes, and bunkers; or to determine the maximum angle of inclination for a conveyor.
Coefficient of Friction - category: Conveyor
Coefficient of friction is a numerical expression of the ration between the force of contact existing between two surfaces and the resistance force tending to oppose the motion of one with respect to the other.
Cog Wheel - category: FlatTop Chain
A pulley wheel with teeth used to drive competitive plastic belts.
Comb Transfer Plate - category: FlatTop Chain
A special dead plate with "fingers" on the ends that is used with raised rib chain to accomplish smooth transfers.
Combination Misalignment - category: Coupling
Combination misalignment occurs when both parallel and angular shaft misalignment occurs. This is the most commonly observed type of misalignment in the field.
Configuration - category: Gear
Configuration is the term that expresses the shaft position or relationship. For example, a gearbox that has an output shaft at a right angle to the input shaft is described as being a right-angled configuration.
Conveyor - category: Conveyor, Industrial Chain
A horizontal, inclined, or vertical device for moving or transporting bulk materials, packages or objects in a path predetermined by the design of the device and having points of loading and discharge fixed, or selective; included is skip hoists and vertical reciprocating and inclined reciprocating conveyors. Typical exceptions are those devices knows as industrial trucks, tractors and trailers, tiering machines (truck type), cranes, hoists, monorail cranes, power and hand shovels, power scoops, bucket drag lines, platform elevators or conveyors designed to carry passengers of the elevator operator, and highway or rail vehicles.
Conveyor (Belt, Roller, Chain) - category: FlatTop Chain
A horizontal, inclined, or vertical device for moving or transporting bulk materials, packages or objects. A chain conveyor uses one or more chains to act as the conveying element. A belt conveyor uses a belt to carry materials and transmit the power required to move the load being conveyed. A roller conveyor has a series of rollers supported in a frame over which objects are advanced manually by gravity or power.
Conveyor Belt - category: Industrial Chain
A belt used to carry materials and transmit the power required to move the load being conveyed.
Conveyor Belt - category: Conveyor
A conveyor belt is used to carry material and transmit the power required to move the load being conveyed.
Conveyor Width - category: Industrial Chain
In unit handling, the dimension inside to inside of frame rails. In belt conveyors for bulk materials, the width of the belt. In vibrating conveyors, distance between side walls. In slat conveyors, the length of the slat.
Conveyor Width - category: Conveyor
In unit handling, the conveyor width is the dimension inside to inside the farm rails. In belt conveyors for bulk materials, it is the width of the belt. In vibrating conveyors, it is the distance between side walls.
Corner Disc - category: FlatTop Chain
A rotating disc used as an alternative to a sliding corner track that greatly reduces chain tension.
Curved Belt Conveyor - category: FlatTop Chain, Industrial Chain
A curved belt conveyor is a type of unit load belt conveyor usually operating horizontally through various angle turns, usually 30, 45, 60, 90 or 180 degrees.
D Style Gripper ("bubble style") - category: FlatTop Chain
A SideGrip™ Chain gripper that looks like a "D" when viewed from the side.
Dampening - category: Coupling
Dampening is reducing vibration between connected equipment and shafts. Also called damping.
Deadplate - category: FlatTop Chain
A plate that bridges the transfer gaps from one chain to another. It is usually made of stainless steel or UHMWPE. If the plate is longer than half the product diameter, the product will remain on the plate until other products push it off.
Deflection - category: Gear
Deflection is the unintended movement or change in position of a component due to mechanical force or movement. Deflection can cause wear or bending of the component.
De-rated Chain - category: Conveyor
In chain catalogs, the chains will have a rated working load capacity. De-rated is the rated capacity that may be less than the work load capacity. For example, operating conditions where the chain is subjected to elevated temperatures
DIN - category: Industrial Chain
DIN is standardization carried out by the German Institute for Standardization. DIN-ISO is the International standardization applied nationwide. Chains manufactured to American standard chains are covered by ISO606 and DIN 8187. These standards cover 3 versions: Simplex, Duplex and Triplex. The range of pitch sizes can vary between 4mm, (0.158 inch) to 114.3mm, (4.500 inch). They are characterized by a large pin diameter, especially for the larger pitch sizes. This results in better wear resistance due to the greater bearing area. The ISO standard has a simple form of part numbering, for example:
  • 1/2 inch pitch duplex chain would be 08B-2.
  • The first two digits are the pitch size in 1/16s of an inch, therefore 08 = 8/16 or 1/2 inch.
  • The letter ""B"" indicates European Standard.
  • The suffix 2 indicates the number of strands in the chain, in this case a duplex chain.
Disc Pack - category: Coupling
The flexing element of a disc coupling. It may be referred to as a “shim” pack, laminating ring, or flex element.
Discharge End - category: Industrial Chain
Location at which objects are removed from the conveyor.
Discharge End - category: Conveyor
The discharge end is the location at which objects are removed from the conveyor.
Donut - category: Coupling
The elastomeric element in donut or tire type elastomeric couplings.
Double Helical Gearing - category: Gear
Double helical gears are a type of gear with two sets of teeth cut at opposing angles, separated by a groove that runs around the center of the gear. They are used to provide smooth operations and do not produce thrust loads.
Double Pitch Chain - category: Industrial Chain
A roller chain using the same joint members as standard pitch chain and having the same dimensions except for the pitch which is twice standard.
Drag Chain Conveyor - category: Industrial Chain
A type of conveyor having one or more endless chains which drag bulk materials through a trough.
Drag Conveyor - category: Conveyor
Drag conveyors are enclosed conveyors used when the elevation of the transported material changes by using a chain guided through an enclosed trough.
Drive - category: Conveyor, Industrial Chain
An assembly of the necessary structural, mechanical and electrical parts which provide the motive power for a conveyor.
Drive Belt - category: Industrial Chain
A belt which is used to transmit power or motion from one part to another.
Drive Belt - category: Conveyor
A drive belt is used to transmit power or motion from one part to another.
Drive Chain - category: Industrial Chain
A chain used to transmit power
Drive Chain - category: Conveyor
A chain used to transmit power.
Drive Shaft - category: Industrial Chain
A main driving shaft on which conveyor sprockets, gears or pulleys are mounted. This shaft is connected to the drive unit through a coupling, sprocket, gear or other form of mechanical power transmission.
Drive Shaft - category: Conveyor
A main driving shaft on which a conveyor sprockets, gears, or pulleys are mounted. This shaft is connected to the drive unit through a coupling, sprocket, gear, or other form of mechanical power transmission. A drive shaft is also used to support the end of a conveyor screw in a trough end and as a driving connection between a conveyor screw and the power transmitting medium.
Drive Side - category: Coupling
The driver or driving shaft (motor) that moves the driven side (pump or motor).
Drive Sprocket - category: FlatTop Chain, Industrial Chain
One or more sprockets on a shaft used to drive a conveyor. The drive shaft is connected to the drive unit through a coupling, gear, or other form of mechanical power transmission.
Driven Equipment - category: Gear
Driven equipment is the machine or device that requires the power to be able to perform work.
Driven Gear - category: Gear
The driven gear receives motion from the drive gear on a machine. They often turn tools or components. Yes, this was for the gear in the gear/pinion relationship
Driver - category: Gear
The driver is the motor, engine, or turbine that provides the power needed to perform work within a system.
Dry Well - category: Gear
A  ‘No Leak’ Drywell isolates the Oil in the sump from the gear box (vertical down) output shaft, LS Lower Bearing, and the LS Lower seal effectively preventing a head of oil from forming on the lower bearing and seal. This prevents the gear lubricants from leaking out of the unit and contaminating the product that is being mixed below.
DTS (DynamicTransfer System) - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a knifed edge MatTop® Chain used to create a smooth transfer without the use of a deadplate.
DTS-C - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a patented, self-clearing 90° transfer system that combines the benefits of a comb transfer with the self clearing capabilities of a Rexnord DTS™ chain.
Durometer - category: FlatTop Chain
The international standard for the hardness measurement of rubber, plastic, and other non-metallic materials. The lower the number, the softer the material. Rexnord uses the Durometer scale to measure the hardness of chain grippers and high friction inserts.
Dynamic Misalignment - category: Bearing
Dynamic Misalignment can accommodate variations in alignment during operation
Dynamic Misalignment - category: Coupling
Dynamic Misalignment can accommodate variations in alignment during operation.
Efficiency - category: Gear
Efficiency is the measure of power transmitted by the gearbox in the relation to the amount of power put into it. Helical and bevel hearing is 98.5% - 99% efficiency per gear set. While a worm gear ranges 60-95% efficiency per reduction.
Elastomeric - category: Coupling
A coupling that has resilient materials through which the power is transmitted. They are in some way attached to the coupling halves. They are usually made of rubber, synthetic rubber or plastic materials.
Elevator - category: FlatTop Chain
A machine used to raise products to another level. Rex® SideGrip™ Chain is used on continuous-flow "Gripper Elevators".
Enclosed Gear Drive - category: Gear
An enclosed gear drive is a system of assembled gears encased by a housing that transmits mechanical energy from a prime mover to an output device. It is also referred to as a gearbox.
End Float - category: Coupling
End float is also called axial misalignment. It is a condition where shafts could be in angular and parallel alignment, but move in and out relative to each other.
Endurance Limit - category: Industrial Chain
Endurance limit, Fatigue limit, and fatigue strength are all expressions used to describe a property of materials: the amplitude (or range) of cyclic stress that can be applied to the material without causing fatigue failure.
En-masse Conveyor - category: Conveyor, FlatTop Chain
En-masse conveyors use skeletal or solid flights mounted at intervals on a cable or chain within a closely fitting casing in horizontal, vertical, or inclined positions. They are designed for bulk materials that must be enclosed to prevent leakage or explosion.
Envelope - category: Gear
Envelope is the term used for the space available for the mounting of the gearbox in the system.
Expansion Bearings - category: Bearing
Expansion (float) Bearings allow for the axial movement of the shaft relative to the housing and accommodates for thermal expansion of the shaft.
Fatigue Failure - category: Industrial Chain
Fatigue failure is defined as a material failure by means of progressive cracking under repeated alternating or cyclic stresses of a intensity considerably below the normal strength (one time load). Although the failure is a catastrophic type, it may take some time to spread depending on the both the intensity and frequency of the stress cycle.
Ferritic - category: FlatTop Chain
A grade of stainless steel that has minimal corrosion resistance, is not work-hardenable, can be easily polished, is magnetic, and is less expensive compared to the austenitic grade.
Fixed Bearing - category: Bearing
Fixed (held) bearings have axial play limited to internal axial clearance and carry axial (thrust) loads. Axial play is limited to internal axial clearance. Fluting refers to the removal of material which creates shallow grooves running vertically along a surface.
Fixture - category: Conveyor
A fixture is a device or attachment fastened to or propelled by the conveying medium. It is used for supporting or securing objects being processed as they are conveyed.
Flange - category: Coupling, Gear
The flange is the external pilot or rim used for attaching the gear reducer to another piece of equipment. The flange is the largest diameter of a coupling hub or center member. The part that contains the bolt holes that connect the disc pack.
Flight Conveyors - category: Conveyor
Flight conveyors push material with paddles attached to single or double strands of chain. The paddles drag or push pulverized or granulated solid materials along a trough.
Floating Shaft - category: Coupling
Floating shaft is a spacer shaft of varied length supported between two single flex couplings.
Floor Conveyor - category: Industrial Chain
Any of several types of conveyors using chain, cable or other linkage mounted near or flush with the floor for the purpose of assembling, or finishing built-up products and subassemblies.
Flow - category: Conveyor, Industrial Chain
Flow is the direction of travel of the product on the conveyor.
FPM - category: Conveyor
FPM stands for Feet for Minute.
Frame - category: Conveyor
A frame is the structure which supports the machinery components of a conveyor.
Fretting - category: Gear
Fretting is when two pieces of metal chemically weld themselves together due to the friction created from micro clearances that exist on all shaft mounted drives.
Fretting Corrosion - category: Bearing
Fretting corrosion is damage or excessive wear to the shaft. This damage is induced under load and in the presence of repeated relative surface motion, as induced for example by vibration. This image is an example of extensive fretting corrosion on the outer race of a deep groove ball bearing.
Gate - category: Conveyor
A gate is a device or structure by means of which the flow may be stopped or regulated.
Gear - category: Gear
A gear is a round or cylindrical mechanical component with teeth used to transmit power. Gears are designed to intersect with one another and can alter the speed, torque, or direction of mechanical energy.
Gear motor - category: Industrial Chain
A motor and speed reducer combination where the two units are flanged for connection to each other and have one output shaft; or where the two units are closely coupled with the motor resting on a base which is an integral part of the speed reducing housing.
Gear Motor - category: Conveyor
A gear motor is a motor and speed reducer combination where the two units are flanged for connection to each other and have one output shaft; or where the two units are closely coupled with the motor resting on a base which is an integral part of the speed reducing housing.
Gear Reduction - category: Gear
A gear reduction is the use of gears to reduce the speed or RPM (Revolutions Per Minute) of the driver to a speed appropriate for the driven application. This reduction also increases transmitted torque at the same ratio.
Gear Set - category: Gear
A gear set is a combination of gears intended to reduce speed and/or change the direction of power flow within the system.
Gear Train - category: Gear
A gear train is a system of gear sets used to transmit rotary motion from one part of a mechanical system to another
Gearbox - category: Gear
A gearbox is an enclosed system of assembled gear sets that transmits mechanical energy from a prime mover to an output device. This is also referred to as a gear drive or speed reducer.
Gravity Conveyor - category: Conveyor
A gravity conveyor is a roller or wheel conveyor over which objects are advanced manually by gravity.
Gravity Discharge Elevator - category: Conveyor
A Gravity discharge or “continuous” bucket elevator is designed to handle material that is larger in size than 2” in diameter up to a maximum recommended size of 8” inches. The design and spacing of the buckets allows the larger material to cascade down the backside of the preceding bucket into the discharge chute. This style elevator also allows material that is prone to breakage to be conveyed without product damage
Guard Rail - category: Conveyor
A guard rail run parallel of the path of the conveyor and limit the material or object movement in a defined path.
Guiderails - category: FlatTop Chain
Members paralleling the path of a conveyor and limiting the objects or carriers to movement in a defined path.
Heat Treatment - category: Industrial Chain
Heating and cooling a solid metal or alloy in such a way as to obtain desired conditions or properties.
Heavy Duty Chain - category: Industrial Chain
A roller chain using the same joint members as standard pitch chain and having the same dimensions except for the side plate or link plate which is equal to the next larger chain. For example, a 60 heavy duty chain will have the link plate thickness of an 80 base roller chain. These chains are designated with an H after the number such as 60H.
Helical Gearing - category: Gear
Helical gears are a type of gear with teeth orientated at an angel to the shaft. Helical gears are smoother and quieter than spur gears at high speeds. But they are more expensive and produce side loads.
Herringbone Gearing - category: Gear
Herringbone Gears are a type of gear that has angled teeth in the shape of a letter "V." They do not produce thrust loading, but are expensive and difficult to manufacture. Herringbone gears are ideal for high shock and vibration applications.
High Friction - category: FlatTop Chain
Chain with rubber inserts molded into the top of the chain links for increased friction. Rexnord now offers 2 basic types: HPM and HTF/TCF.
High Speed Shaft - category: Gear
The High Speed Shaft (HSS) is the input shaft and the rotating shaft that is driven from the power source and introduces it into a mechanical system. This is also referred to as the input shaft.
Hold Down TABs - category: FlatTop Chain
A T-shaped accessory installed under a MatTop® Chain used to return the chain or hold the chain down when transitioning to an incline.
Hollow Bore Output - category: Gear
Hollow Bored Output is a straight bored shaft with a key to mount onto the head shaft.
Hollow Pitch Chain - category: Industrial Chain
A roller chain using the same joint members as standard pitch chain and having the same dimensions except for the pin which contains a whole through the center. The hole is typically used for cross rods or customer attachments.
Horsepower - category: Coupling
The rate at which torque is applied. Since applied torque causes a shaft and its connected components to rotate, a certain RPM results. Horse Power (HP) is calculated by the following equation:
HP = Torque (lb. -in.) x RPM 63,025
Housing - category: Gear
The housing is a protective casing for a system of gears and provides an oil sump for lubrication.
HPM - category: FlatTop Chain
Rexnord terminology or nomenclature to depict chain with rubber inserts Molded on top of the chain links. The rubber inserts can be spaced at different intervals as follows: every link, every other link, every 3rd link, etc.
HTF (High Temperature Friction Top) - category: FlatTop Chain
Rexnord terminology or nomenclature to depict chain with rubber inserts molded on top of HT (polypropylene) links.
Hydrodynamic Device - category: Coupling
Hydrodynamic devices are operated by the force of liquid (water or oil) in motion to transmit rotating mechanical power.
Hypoid Gearing - category: Gear
Hypoid gears are a type of gear resembling a bevel gear in a form, but designed to mesh with a similar gear in such a way that their axes would not intersect.
Hytrel - category: Coupling
Hytrel is a thermoplastic polyester elastomer that has the flexibility of rubbers, the strength of plastics, and the processibility of thermoplastics. It can be processed easily by conventional thermoplastic processes like injection molding.
Idler - category: Conveyor, Industrial Chain
An idler is a pulley, sheave, sprockets, or wheel which a belt, cable, or chain passes in changing direction of travel.
Idler Gear - category: Gear
An idler gear is used to keep the direction of motion consistent between a drive gear and a driven gear.
Idler Roller - category: Industrial Chain
Any carrying roller of a live roller conveyor not driven.
Idler Roller - category: Conveyor
An idler roller is any carrying roller of a roller conveyor not driven.
Idler Sprocket - category: FlatTop Chain
A sprocket with an oversized bore and no keyway that can spin freely on a fixed tail shaft.
IEC - category: Gear
The International Electrotechnical Commission (IEC) provides the European standardization of manufactured electrical equipment and products used in the generation, transmission, distribution, control, and end use of electricity. IEC motors operate the same as NEMA (National Electrical Manufactures Association – North America), but they have metric dimensions.
Induction Hardening - category: Industrial Chain
Induction hardening is a surface-hardening process in which only the surface layer is heated by electromagnetic induction to transform the microstructure to get a hardened surface. It is often used in conjunction with through hardening to get a combination of both features.
Inertia - category: Coupling
The tendency of matter to remain at rest or, if moving, to keep moving in the same direction. Examples of high inertia loads are fans and fly wheels.
Inline Configuration - category: Gear
An inline configuration allows the transmission of power in line with the driver.
Inline Transfer - category: FlatTop Chain
The transfer of product from one conveyor to the next moving in a straight line.
Input Shaft - category: Gear
An input shaft is the rotation shaft that receives power from the power source and introduces it into a mechanical system. This is also referred to as the high speed shaft.
Input Speed - category: Gear
Input speed is the speed expressed in RPM (Revolutions Per Minute) of the input shaft of the gearbox.
Interference Fit - category: Coupling
It gets its name because the bore is actually smaller than the shaft it is to be mated with. It is the strongest fit possible, but requires heating the hubs to install on the shafts. Also called a shrink or press fit.
Ionized Air - category: FlatTop Chain
Air that has been passed through an electric field giving it an electric charge. This is sometimes used to clean dust off of food and beverage containers.
J Style Gripper (Jaw Gripper) - category: FlatTop Chain
The SideGrip Chain gripper that has fingers angled back.
L10 Life - category: Bearing
Bearings are rated using the L10 formula in which L10 represents fatigue life in hours with a reliability of 90%.
Below is the roller bearing L10 formula. To calculate the life expectancy in hour (L10):
  1. Divide the basic load rating by the equivalent radial load (C/9)
  2. Raise the answer it to the ten third power (10/3)
  3. Multiple by 1 million
  4. Divide the answer by the multiple of the speed (N) * 60
LBP (Low Backline Pressure) - category: FlatTop Chain
Chain with rollers on top to allow for in-line product accumulation with much lower product backline pressure than solid top, perforated, or raised rib chains.
Leaf Chain - category: Industrial Chain
Leaf chain is similar to roller chain but different enough to have its own classification called lift or leaf chain. The chain consists of roller chain link plates assembled without the use of bushing or rollers found in standard roller chain. Unlike roller chain, leaf chain uses sheaves rather than sprockets because there is no space for sprocket teeth engagement.
Left-handed Helical Gear - category: Gear
A left-handed helical gear is a helical gear with teeth that lean to the upper left when the gear is placed on a flat, horizontal surface.
Linear Motion - category: Gear
Linear motion takes place along a straight line rather than in a circle around an axis.
Load - category: Gear, Industrial Chain
Load is an expression of the amount of power required by the driven machine to perform its work. Load also is used to describe any force within a system (i.e. thrust load, radial load, torque load). Or the total weight on a conveyor.
Low Speed Shaft - category: Gear
The Low Speed Shaft (LSS) is the rotating output shaft that receives power from the mechanical system and transfers it to the output source. It is also referred to as the output shaft.
Lowerator - category: FlatTop Chain
A machine used to lower products to another level. Rex® SideGrip™ Chain is used on continuous-flow "Gripper Lowerators".
LPC - category: FlatTop Chain
(Low Pin Centerline)Rexnord terminology or nomenclature to depict a special side-flexing TableTop Chain with a unique hold down method for good corner retention that can still be lifted out of the conveyor track. The chain must be used with special Rex LPC Corner Tracks.
Lubricant - category: Gear
Lubricant is a substance used to reduce friction between two surfaces in relative motion. Oil and grease are common industrial lubricants. Lubrication reduces friction and wear between mechanical components.
Lubricant Impregnated Wood - category: FlatTop Chain
Wood or wood laminate impregnated with lubricant, which reduces friction, used to make wearstrips.
Magnetflex - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a special side-flexing TableTop Chain held down in the corners by a magnetic force between the pin or link and the permanent magnets in the corners. The chain must be used with special Rex Magnetflex Corner Tracks.
Meshing - category: Gear
Meshing is the action of interlocking with another object, such as two gear teeth. Meshing gears are used to transmit mechanical energy.
Motor - category: Gear, Industrial Chain
A motor is a machine that converts electricity into mechanical energy or motion. A motor is a type of prime mover.
Motor - category: Conveyor
A motor transfers electric energy into mechanical energy.
MTW (Molded to Width) - category: FlatTop Chain
Standard Rex MatTop Chain molded to a specific width. The widths are similar to the Rex TableTop Chain widths.
Multiple Strand Chain - category: Industrial Chain
Multiple Strand chain is standard roller chain manufactured with multiple strands are assembled together. These chains are designated with the number of strands following the base chain number. For example an 80 roller base chain with 3 strands is designated as 80-3.
NEMA - category: Gear
The National Electrical Manufacturers Association (NEMA) provides the North American standardization of manufactured electrical equipment and products used in the generation, transmission, distribution, control, and end use of electricity. These products are used in utility, industrial, commercial, institutional, and residential applications.
Nose-Over - category: FlatTop Chain
Curved or segmented frame sections having rollers properly spaced to provide a transition from incline to level or from level to decline.
Nose-Over Bar Transfer - category: FlatTop Chain
The type of inline transfer where the chain passes over a "bar" with a small radius. This is used in place of end sprockets to create a self-clearing transfer.
Nuisance Charge - category: FlatTop Chain
A charge that causes annoyance or trouble.
Nylatron - category: FlatTop Chain
A patented plastic material with high PV limits used for wearstrips.
Offset Link - category: Industrial Chain
An offset link is a type of chain that has a step in the side plate allowing for single links to be removed out of a strand of chain.
Offset Pin Hole - category: FlatTop Chain
A special pin retention method utilizing outer pin holes that are offset from the center pin holes.
Oil Sump - category: Gear
An oil sump is the reservoir that holds the lubricant in a gearbox. Typically, this reservoir is just the open space within the gearbox, not an extra design feature.
Open Area - category: FlatTop Chain
A Rex MatTop Chain that has 30% or more open area.
Open Gearing - category: Gear
Open gearing is when gears are not enclosed in a gearbox, but rather open. Large ring gears and mill pinions are an example of open gearing.
O-Ring Chain - category: Industrial Chain
The o-ring chain is named for the rubber o-rings built into the space between the outside link plate and the inside roller link plate. O-ring chain was developed to improve lubrication to the links of power transmission chains. The rubber o-rings form a barrier that holds factory applied lubrication inside of the pin and bushing wear areas.
Output Shaft - category: Gear
The output shaft is the rotating shaft that receives power from the mechanical system and transfers it to the output source. It is also referred to as the low speed shaft.
Output Speed - category: Gear
The output speed is the speed of expressed in RPM (Revolutions Per Minute).
Overhung Load - category: Gear
The overhung load is the radial (outward) force on the reducer shaft in any direction caused by chain, belt, or pinion and gear connection.
Pan Conveyor - category: Conveyor
A pan conveyors is a slow moving chain conveyor in which a series of overlapping pans or plates are attached to continuous chains.
Parallel Misalignment - category: Coupling
A condition where the shaft axis or center lines of two shafts are parallel but offset from each other.
Perforated Top: A Rex® MatTop® Chain that has between 6% and 30% open area. - category: FlatTop Chain
PET (polyethylene terephthalate) - category: FlatTop Chain
The chemical name of the material used for plastic beverage bottles (i.e. 2 liter, 20 oz, etc.).
Pillow Block - category: Conveyor
A pillow block is a bearing block or housing having a flat mounting service offset, but parallel to the shaft.
Pinion - category: Gear
The pinion is the circular gear with a small number of teeth used to engage a larger gear to produce linear motion. It is usually the smallest gear in a gear drive.
Pitch - category: Gear, Industrial Chain
Pitch is the distance between roller centers and defines the size of the chain. It is also a property used to classify gears. Pitch refers to the number of gear teeth in one inch of the gear’s pitch diameter.
Pitch Diameter - category: Gear
Pitch diameter is the diameter of a gear’s pitch circle. It can be determined by measuring from the top of the gear tooth to the bottom of the opposite gear tooth.
Plane - category: Gear
A plane is a flat or level surface.
Plug - category: FlatTop Chain
A small disk that is snapped into the outer pin holes of a Rex MatTop Chain that prevents the pin from walking out.
Pneumatic Conveyor - category: Conveyor
A pneumatic conveyor is a system that uses pipes or ducts, called transportation lines, to carry mixture of materials and a stream of air.
Positrack Tracking Guide - category: FlatTop Chain
Rexnord terminology or nomenclature to depict an accessory under a Rex MatTop Chain which rides between 2 wearstrips and keeps the chain from moving from side to side. Track widths are similar to the Rex TableTop Chain guide clearances.
Prime Mover - category: Gear
A prime mover is a machine that converts energy from a source in order to power equipment such as an engine.
PTFE (PolyTetraFlouroEthylene) - category: FlatTop Chain
A plastic additive, such as Dupout's Teflon, with very low friction properties used in Rex LF and HP chain materials. It is also used for wearstrip materials, but is only recommended for low speed applications.
Pulley - category: FlatTop Chain, Industrial Chain
A cylindrical member, but sometimes polygonal in cross section with provision for mounting on a shaft.
Pusher - category: Conveyor
A pusher is a powered mechanical device mounted on or adjacent to a conveyor that, when activated, will transfer material from or to the conveyor.
Pusher (F-Attachment) - category: FlatTop Chain
A molded vertical plastic chain attachment, perpendicular to the direction of travel, used to push product in the chain direction of travel. It is mainly used for inclines, declines, and indexing. F-Attachment follows the naming standard from roller chains.
PV - category: FlatTop Chain
The abbreviation for Pressure Times Velocity, which is used to evaluate the wear rate between sideflexing chain and inside corner wear strips.
Radial Clearance - category: Bearing
Radial Clearance is the amount of radial movement of the rings without imparting a radial load
Radial Load - category: Bearing, Gear
Radial loads act at right angles to the shaft or bearings axis of rotation. It is the force applied perpendicular to the axis of bearing’s shaft. Radial loads are also called rotary loads.
Raised Rib - category: FlatTop Chain
A chain that has a rib and groove design on top, allowing for a smooth transition from one chain to the next through the use of transfer combs.
RexFlex - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a special proprietary side-flexing Rex MatTop Chain.
Right-hand Helical Gear - category: Gear
A right-hand helical gear is a helical gear with teeth that lean to the right when the gear is on a flat, horizontal surface.
Rinser - category: FlatTop Chain
A machine used to rinse out empty containers before they are filled. The types of rinsers include Gravity, Twist, Gripper, or Rotary. The Gripper uses Rex SideGrip Chain.
Roller - category: Conveyor, Industrial Chain
A roller is a round part free to revolve about its outer surface. Rollers serve as the rolling support for the load being conveyed. The face may be straight, tapered or crowned.
Roller Conveyor - category: Conveyor
A roller conveyor is a series of rollers supported in a frame over which objects are advanced manually, by gravity, or by power.
Rotary Motion - category: Gear
Rotary motion is the spinning or turning motion that takes place around an axis, without a change in linear position.
Rotary Rinser - category: FlatTop Chain
The rotating bottle cleaner prior to a bottle filler. As it rotates, the bottles are inverted, rinsed with water, drained, and up righted.
Rough Top Belt - category: Conveyor
A rough top belt is intentionally made with irregular ridges or projections to produce a broken surface for greater traction or carrying abilities.
RPM - category: Bearing, Coupling, Conveyor
Revolutions Per Minute (RPM) is the standard measure of measuring speed of shaft, motor or an engine.
Screw Conveyor - category: Conveyor
A screw conveyor, also known as an auger conveyor, is a mechanism that uses a rotating helical screw blade within a tube to move liquid or granular material.
Seal - category: Gear
A seal is a tight closure that prevents the entrance of contaminates and retains lubrication in a gearbox.
Selective Heat Treatment - category: Industrial Chain
Many heat treating methods have been developed to alter the properties of only a portion of an object. Selective heat treatment consists of either cooling different areas of an alloy at different rates, by quickly heating in a localized area and then quenching.
Self Lubricated Chain - category: Industrial Chain
The self lubricated chain is named for the special bushing material in the roller chain design. Self lubricated chain was developed for applications that cannot tolerate maintenance lubrication applied in service. Self lubricated chains typically contain an oil impregnated or sintered steel bushing.
Service Factor - category: Gear
The service factor is a measure of periodically overload capacity at which a motor or gearbox can operate without overload or damage.
Service Factor - category: Coupling
A value associated with the ‘severity’ of an application which is used to determine the coupling size.
Shaft - category: Gear, Industrial Chain
In a mechanical system, a shaft is a cylindrical bar used to support rotating components or to transmit power or motion by rotation.
Shaft - category: Conveyor
A shaft is a bar that supports rotating parts or to transmit power.
Shaft Coupling - category: Gear
A shaft coupling is used to connect two shafts that run in the same direction and on the same centerline. The functions of a coupling are to: Connect two shafts, Transmit required torque or turning power, Accommodate unavoidable misalignment
Shaft Gap (DBSE) - category: Coupling
Shaft gap is the Distance Between Shaft Ends (DBSE).
Shaft Position - category: Gear
Shaft position is the relationship of the input shaft to the output shaft. The relationship can be inline, at a right angle, or in an offset parallel position depending on the gearbox type.
Shear Pin - category: Coupling
A protection device used on some couplings to protect driver and driven equipment against overload. The pin is located between coupling halves and is machined to break or shear at a predetermined load allowing the driver side to free wheel
Sheave - category: Industrial Chain
A sheave is the freely moving wheel that is part of a moveable pulley. The sheave usually contains a groove to hold a rope or chain. A sheave is used with leaf chain.
Shock Load - category: Gear
Shock load refers to the stress exerted on the drive during start-up or impact loads cause by repeated changes in direction or system shock loads. The service factor is one of the means for compensation for peak loads.
Shock Load - category: Coupling
Shock load is when a sudden intense force is placed on the parts of a machine. For example, the start up of a conveyor system.
Shrink Disc - category: Gear
A shrink disc is an external locking device that provides a high capacity interference fit with all the positive features of conventional interference fits, but without the assembly and dismounting problems.
Shrouded Bolt - category: Coupling
Shrouded bolt is the optional recessed bolt arrangement available on rigid and gear couplings. This design shrouds the rotating bolt heads and locknuts during operation. Bolts are installed with a socket wrench.
Side Bow Chain - category: Industrial Chain
A roller chain containing extra clearances between pins, bushings and link plates to allow the chain to side-flex or turn.
Side Load - category: Gear
A side load is a force that occurs when gears are meshed together at an angle. They can lead to deflection and wear.
Side-flexing - category: FlatTop Chain, Industrial Chain
Chain that has the ability to move sideways through turns or corners.
SideGrip - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a chain used to grip products from the side and carry them to another area. Mainly used on elevators, lowerators, and bottle rinsers.
Sideguards - category: FlatTop Chain
An accessory guard on the side of a Rex MatTop Chain used to contain bulk products on the chain.
Silent Chain - category: Industrial Chain
A type of chain with teeth on its links that mesh with teeth in the sprockets of a chain drive. A silent chain operates quietly and smoothly and is also known as an inverted-tooth chain.
Skate-wheel Conveyor - category: FlatTop Chain
A type of wheel conveyor making use of series of skate-wheels mounted on common shafts or axles, or mounted on parallel spaced bars on individual axles.
Soldered Head - category: FlatTop Chain
The end of a Rex MatTop Chain pin that is melted over to form the shape of a mushroom that holds the modules together and keeps the pins from walking out.
Solid Top - category: FlatTop Chain
A Rex MatTop Chain that has little or no open area.
Speed - category: Coupling, Gear
Speed is the rate at which material moves on a conveyor.
Speed Increaser - category: Gear
Speed increaser is a gearbox used to increase speed of mechanical energy while decreasing the torque. Speed increasers are not used as often as speed reducers.
Speed Reducer - category: Gear, Industrial Chain
A power transmission mechanism designed to provide a speed for the driven equipment less than that of the prime mover. Speed reducers may have either constant speed or adjustable speed while increasing the torque. They are generally totally enclosed to retain lubricant and prevent the entry of foreign materials.
Spider - category: Coupling
The elastomeric element of a flexible jaw type coupling. They usually have 4 or 6 arms.
Spiral Bevel Gear - category: Gear
A spiral bevel gear is a type of bevel gear with conical and curved spiral angled teeth. It is designed for smooth operation. The spiral angle of most bevel gears is 35 degrees
Splash Lubrication - category: Gear
Splash lubrication is a type of lubrication used in enclosed gear drives. The gear tooth dips into a tray of lubrication and transfers the lubrication to the meshing gear as it rotates.
Sprocket - category: Conveyor, Industrial Chain
A sprocket is a wheel with suitable shaped and spaced teeth to engage with the links of a chain.
Sprocket Designations - category: FlatTop Chain
  • KU Machined Plastic Sprocket
  • KUS Machined Plastic Split Sprocket
  • N Molded One Piece Plastic Sprocket
  • NS Glass Reinforced Nylon Split Sprocket
  • PosiClean Solid, Extruded Plastic Sprocket that extends the width of the chain
  • Semi-Steel Arm Body Cast Iron Sprocket that has spokes extending out of hub
  • Semi-Steel Block Body A solid cast iron sprocket with no open area
  • SSS Stainless Steel Split Sprocket
Spur Gear - category: Gear
A spur gear is a type of gear that has a straight, flat-topped teeth set parallel to the shaft. It transmits power through shafts that are parallel. Spur gears produce no thrust loads, but require frequent lubrication due to the sliding and rolling motion they create.
Stainless Steel - category: FlatTop Chain
A form of steel containing chromium, resistant to tarnishing or rusting associated with exposure to water and moist air. Austenitic and ferritic stainless steel are two types of materials common in manufacturing metal chains.
Static Misalignment - category: Bearing, Coupling
Static Misalignment refers to misalignment that is generally put into the system at installation.
Straight Bevel Gear - category: Gear
A straight bevel gear is a basic bevel gear, which has tapered teeth that are widest at their outer part. They are cost-effective when transmitting power between shafts at right angles.
Straight Running - category: FlatTop Chain, Industrial Chain
A chain that does not make any sideway turns.
TA Taper Bushing - category: Gear
Rexnord’s TA Taper Bushing is designed for the fit to be released from the compressing forces on the taper bushing as the nut drives the unit off the head shaft. The minimum shaft engagement allows for easy installation and removal.
TAB - category: FlatTop Chain
An L-shaped accessory installed under a chain that holds the chain down in the corners (used with rectangular corner wear strips).
Take-up - category: FlatTop Chain, Industrial Chain
The assembly of the necessary structural and mechanical parts which provides the means to adjust the length of belts, cables, chains, etc. to compensate for stretch, shrinkage, or wear and to maintain proper tension.
Take-up - category: Conveyor
The take-up is the assembly of the necessary structural and mechanical parts which provides the means to adjust the length of belts, cables, chains, etc. to compensate for stretch, shrinkage, or wear and to maintain proper tension.
Take-up Pulley - category: Conveyor
The take-up pulley is mounted on the take-up shaft.
TCF (Tough Composite Friction Top) - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a chain consisting of urethane inserts molded on top of TC (tough composite material) links.
Textured Top - category: FlatTop Chain
A chain surface intentionally made with irregular ridges or projection to produce a broken surface for greater traction or carrying abilities. Used for inclined service.
Thermal Capacity - category: Gear
Thermal capacity is a specific temperature that an object can hold until it bends, melts, or changes molecular form.
Thermal Expansion - category: Coupling
Thermal expansion is the lengthening of shafting caused by temperature changes in environment.
Through Hardening - category: Industrial Chain
Through hardening is a generic term covering heat treatment processes that change the micro structure of a part through the cross section hardening of the entire part through to the core.
Thrust Load - category: Gear
A thrust load is the pushing or pulling force along the axis of the gearbox shaft which is often encountered in mixer applications.
Torque - category: Coupling, Gear
Torque is turning power. It is the force required to turn a shaft multiplied by the radius at which the force is applied. Torque is calculated by the following equation: Lb. in Torque = HP x 63,025 RPM
Torsional Density - category: Coupling
There are two main kinds of torsional vibration: a continuous steady form that comes from reciprocating engines and an intermittent form that comes from large synchronous electric motors or from the driven equipment side in steel rolling mills.
Torsional Vibration - category: Coupling
Torsional vibration is a measure of the torque-carrying capability of a mechanical component. It is a system property, since it depends on the design of each element of the component and their interconnection.
Transfer - category: Conveyor
The transfer is a device or series of devices, usually mounted inside a conveyor section, which uses belts, chains or rollers to move product at right angles to adjacent or parallel conveyor lines.
Trough - category: Conveyor
A trough is a channel generally longer that its width, open at the top, or fitted with a cover, which contains the material being conveyed.
TwistLock - category: FlatTop Chain
Rexnord terminology or nomenclature to depict an integral plug used to retain pins, which can be rotated out of the way for disassembly purposes.
Two Piece (Roller Base Chain) - category: FlatTop Chain
Rex TableTop Chain consisting of a top flight and roller base chain.
UHMWPE (Ultra High Molecular Weight Polyethylene) - category: FlatTop Chain
Most commonly used plastic wearstrip material due to its low friction, wear properties, and relativity low cost.
Unit Link (One Piece) - category: FlatTop Chain
Rex TableTop Chain consisting of only links and pins.
Unit Size - category: Gear
Unit size refers to the size of the gearbox
Urethane - category: Coupling
Urethane is a family of rubber and plastics material that is used for making molds. It is widely known for its tough properties, being abrasion-resistant, economical, relatively simple to mix and apply, and flexibility one it is formed into a mold.
Vacuum Chain - category: FlatTop Chain
Chain that has holes drilled or molded into the flights, which allows a vacuum to suck the products against the chain top surface so they can be transported to another location. The chain typically lowers, elevates, or inverts empty aluminum cans depending on the vacuum conveyor configuration.
Wear - category: Gear
Wear is the gradual removal of material on a surface caused by contact between microscopic peaks on surfaces in motion.
Wearstrip - category: FlatTop Chain
A strip used to support and guide the chain. It is usually made of steel, stainless steel, UHMWP, or wood.
Worm Gearing - category: Gear
Worm gears are a type of gear consisting of a shaft with a helical thread that meshes with a toothed wheel to transfer rotary motion between two shafts at right angles to one another. They produce thrust loads and are good for high shock load, low horsepower applications.
Accumulation - category: FlatTop Chain
There are two types: In-Line Accumulation occurs when products back up and become stationary on the conveyor chain as it continues to slide underneath them. Off-Line Accumulators hold the products off to the side, out of the main flow, until the line clears.
Accumulation Conveyor - category: FlatTop Chain
Any conveyor designed to permit accumulation of packages, objects, or carriers. May be roller, live roller, roller slat, belt, vibrating, power-and-free, or tow conveyors. See Minimum pressure accumulation conveyor and Zero pressure accumulation conveyor.
Accumulation Table - category: FlatTop Chain
A special conveyor that holds excess product during line stoppages. It may utilize TableTop® Chain, MatTop® Chain, wire belt, fabric belt, etc.
Acetal - category: FlatTop Chain
Any organic compound formed by adding alcohol molecules to aldehyde molecules. This is one of the most common materials for molding TableTop and MatTop Chains
Alignment - category: Coupling
A condition where the axis or center lines of two shafts are in line or coaxial.
Angular Misalignment - category: Coupling
A condition where two shafts are not parallel. The axis or center lines of two shafts intersect at angles to each other.
ANSI - category: Industrial Chain
American standard chains are covered by ISO 606, ANSI B29.1 and DIN 8188. The pitch sizes covered by this standard are 1/4 to 3 inch pitch. American standard chains have a smaller pin diameter than their European standard equivalent. American standard chains are normally referred to under the ANSI standard numbering system, for example a 1/2 inch pitch duplex chain would be, ANSI 40-2. The ANSI numbering system works as follows:
  • The first number is the pitch size in 1/8 inch, ie 4/8 = 1/2 inch pitch
  • The second number refers to the chain being a roller chain, 0 = roller chain. A 5 replacing the 0 would indicate a bush chain
  • The suffix, as with European standard chain, refers to the number of strands in the chain, that is 2 = duplex chain
Antimicrobial - category: FlatTop Chain
An additive homogeneously blended into the plastic of our Rex® MatTop® Chains that inhibits the growth of bacteria and other microbes.
Apron Conveyor - category: Conveyor
Apron conveyors move bulk material on a belt of thick steel trays or pan in an enclosed frame. Chains along both ends of the feeder help move the trays along the conveying area.
ASME - category: Industrial Chain
ASME, founded as the American Society of Mechanical Engineers, is a professional association that promotes the art, science and practice of multidisciplinary engineering and allied sciences around the globe. They are involved in continuing education, training and professional development, codes and standards, research, conferences and publications, government relations and other forms of outreach.
Assembled-to-Width - category: FlatTop Chain
Rex MatTop Chain consisting of bricked links available in almost any width on a Made-To-Order (MTO) basis. Standard widths do not require link cutting and are usually available in either 3" or 6" increments (depending on the chain series). Nonstandard widths require cutting, which increases the cost of the chain.
Attachments - category: Industrial Chain
Attachments are defined by dimensional characteristics from a standard table or in the case of special attachments by a precisely detailed drawing. The chain identifying code also includes the attachment code and specifies how the attachment is to be put into position, how many holes it must have, etc. as follows:
  • A = for single-sided bent attachment
  • M = for single-sided vertical attachment
K = for double-sided bent attachment
MK = for double-sided vertical attachment
1 = for single-holed attachment
2 = for double-holed attachment
3 = for triple-holed attachment
01 = for attachment every pitch
02 = for attachment every 2 pitches
10 = for attachment every 10 pitches
0X = for attachment every X pitches
Other special attachments are available. Special attachments or those which depart from the catalog norm, are identified with the same classification criteria but should also include a drawing number.
Austenitic - category: FlatTop Chain
Grades of stainless steel that offer very good corrosion resistance, are work-hardenable, and are relatively non-magnetic compared to ferritic stainless and carbon steels. Austenitic steels provide longer wear life and better overall performance compared to lower grades of stainless steel.
Axial Misalignment - category: Coupling
This is a lengthening of a shaft. It could be caused by thermal changes in environment or induced through the use of a sliding coupling
Axial Clearance - category: Bearing
Axial Clearance is the amount of axial movement of the rings without imparting an axial load
Axial Expansion - category: Coupling
This is a lengthening of a shaft. It could be caused by thermal changes in environment or induced through the use of a sliding coupling.
Axial Load - category: Bearing
Axial or thrust loads are applied parallel to the axis of rotation.
Axis - category: Gear
An axis is an imaginary straight line that passes through the center of an object. A gear may have an opening at its axis (bore) through which a shaft can be inserted.
Babbitt - category: Bearing
Babbitt is type of metallic material used for plain bearings. It is a lead and tin mixture which is relatively soft and for this reason minimizes the danger of scoring or damage to the shaft.
Backlash - category: Coupling
The distance between the center point of two bolt holes 180 degrees apart.
Backstop - category: Gear
Backstops are mechanical devices designed to allow free rotation of a shaft in only one direction and prevents reverse rotation.
Bed - category: Conveyor
A bed is the part of a conveyor upon which the load rests or slides while being conveyed.
Bed - category: FlatTop Chain
That part of a conveyor upon which the load rests or slides while being conveyed.
Belt Conveyor - category: Conveyor, Industrial Chain
An endless fabric, rubber, plastic, leather, or metal belt operating over suitable drive, tail end and bend terminals and over belt idlers or slider bed for handling bulk materials, packages, or objects placed directly upon the belt.
Bevel - category: FlatTop Chain
The angled thrust surface of a side-flexing chain link that holds the chain down in the corners (used with beveled corner wear strips).
Bevel Gearing - category: Gear
Bevel gears are a type of gear with cone-shaped teeth cut at an angle. They are most commonly used to transmit power between shafts that intersect at a 90 degree angle. They are more costly and are not able to transmit as much torque, per size, as a helical gear set.
Bindicator - category: Conveyor
A Bindicator is a device used in an elevator to detect the presence or absence of material. It will send a signal to the control room when material builds up in the boot indicating action need to take place to avoid unnecessary wear on the elevator components.
Block Chain - category: Industrial Chain
A block chain, also called a “bar-link” or “block-and-bar” chain is a mechanical drive chain. Block chain is composed of side plates where each plate straddles one end of a block and is connected to the block with a pin going through a hole at one end of the block. Block chain is heavy and is less efficient rolling over sprockets in compared to a standard roller chain; however, it has advantages in specific applications where fixtures or attachments need to be attached to the chain.
Bolt Hole Circle - category: Coupling
A jarring reaction when starting or reversing a load, caused by play in a coupling.
Bucket Elevator - category: Conveyor
A bucket elevator is a mechanism for moving flow able bulk material using buckets attached to belts or chains based on a standardized design format to lift material vertically.
Bushing - category: Industrial Chain
In chain, a bushing is a renewable liner fixed in the barrel of a link, or center link, to provide an improved bearing surface. A hollow cylinder used to space the sidebars and provide a bearing surface for the chain pin, and on which the rollers may or may not be mounted.
C –face Motor - category: Gear
A "C-Face" motor is a common American mechanical standard designed with a rugged flange on the face of the motor for mounting purposes. The weight of the motor is supported by the flange, which is most commonly attached to a gearbox. The flange is strong enough to cantilever the motor. Naturally, this method is not useful for large motors, and is rarely used over 20 horsepower. C-Face motors are designed to very tight specification.
Capacity - category: Conveyor, Industrial Chain
The number of pieces of a defined size, volume of material that can be handled by a conveyor in a unit of time.
Carbon Steel - category: FlatTop Chain
Steel in which the main allowing element is carbon. The term carbon steel may also be used in reference to steel which is not stainless steel. Carbon steel is not recommended in wet applications as the material will corrode.
Case Hardening - category: Industrial Chain
Case hardening is a generic term covering several heat treatment processes that change the chemical composition of the surface layer of the steel and then transforms the microstructure to get a very hard surface with a ductile core.
Cement Clinker - category: Conveyor
In the manufacture of Portland cement, clinker is lumps or nodules, usually 3–25 mm in diameter, produced by sintering limestone and alumino-silicate (clay) during the cement kiln stage.
Centrifugal Discharge Elevator - category: Conveyor
A centrifugal discharge elevator typically feeds the bucks from the in-feed chute in the boot section and conveys it to the top of the elevator and discharges the material centrifugally down the chute. To accomplish this, these elevators operate at a higher speed than Gravity discharge elevators, roughly 34 RPM at the head shaft. It is recommended when the material that is being conveyed is sized from a fine material, such as finish cement, up to material that is 2 inches in diameter such as rock or Cement clinker.
C-Face Motor - category: Gear
A "C-Face" motor is a common American mechanical standard designed with a rugged flange on the face of the motor for mounting purposes. The weight of the motor is supported by the flange, which is most commonly attached to a gearbox. The flange is strong enough to cantilever the motor. Naturally, this method is not useful for large motors, and is rarely used over 50 horsepower. C-Face motors are designed to very tight specification.
Chain Conveyor - category: Industrial Chain
A chain conveyor is any type of conveyor in which one or more chains act as the conveying elements.
Chain Conveyor - category: Conveyor
A chain conveyor is any type of conveyor in which one or more chains act as the conveying element. The load is positioned on the chains and the friction pulls the load forward.
Chain Drive - category: Conveyor, Industrial Chain
A power transmission device employing a drive chain and sprockets.
Chain Elongation - category: Industrial Chain
When the chain articulates over the sprocket, the pin and bush rotate against each other, causing slight wear on the outside of the pin and inside of the bush. This is what leads to chain elongation. Measuring or tracking elongation can be an effective tool to help monitor chain wear. As chain elongation develops, the chain may creep up on the sprocket teeth until it starts jumping sprocket teeth and can no longer engage with the sprocket.
Chain Materials - category: FlatTop Chain
AS - Anti-Static (Acetal)
CR - Extreme Chemical Resistant (fluorinated polymer)
D - Plain Acetal
WD - White Plain Acetal
ESD - Electrostatic Dissipative (polypropylene)
FR - Flame Retardant (polyester)
HP - High Performance (acetal)
WHP - White High Performance (acetal)
HS - Heat Stabilized (nylon)
HT - High Temperature (polypropylene)
WHT - White High Temperature (polypropylene)
RHT - Red High Temperature (polypropylene)
KHT - Khaki High Temperature (polypropylene)
LF - Low Friction (acetal)
WLF - White Low Friction (acetal)
WLT - White Low Temperature (polyethylene)
BLT - Blue Low Temperature (polyethylene)
MR - Melt Resistant (nylon)
WSM - White Special Material (cut resistant acetal)
BSM - Black Special Material (cut resistant acetal)
P - Chemical Resistant (polyester)
UHS - Ultra High Strength (polypropylene composite)
DUV - Ultraviolet Resistant (acetal)
LUV - Low Temperature Ultraviolet Resistant (polyethylene)
HUV - High Temperature Ultraviolet Resistant (polypropylene)
BWR - Black Wear Resistant (nylon composite)
S - Carbon Steel
SS - Stainless Steel
SSB - Stainless Steel Low Magnetic
TC - Tough Composite (impact-modified composite)
WHA - White High Temperature Antimicrobial (polypropylene)
BHA - Blue High Temperature Antimicrobial (polypropylene)
WLA - White Low Temperature Antimicrobial (polyethylene)
BLA - Blue Low Temperature Antimicrobial (polyethylene)
WSA - White Special Antimicrobial (cut resistant acetal)
GSA - Grey Special Antimicrobial (cut resistant acetal)
GLD - Detectable Grey Low Temperature Antimicrobial (polyethylene)
RLD - Detectable Red Low Temperature Antimicrobial (polyethylene)
THD - Detectable Tan High Temperature Antimicrobial (polypropylene)
Chain Tension - category: Industrial Chain
The actual pull existing at any point in a conveyor chain.
Chain Tension - category: FlatTop Chain
The actual pull existing at any point in a conveyor chain. Chain calculations are often used to ensure a specific chain can handle a specific conveyor application.
Class I Application - category: FlatTop Chain
Explosion Proof Environments
Class II Application - category: FlatTop Chain
Nuisance Static Environments
Clearance Fit - category: Coupling
This is the most popular fit because of its ease of installation. The bore size is larger than the shaft. It maintains its position on the shaft through the use of a key and set screw. Also called a slip fit.
Coefficient of Friction - category: FlatTop Chain, Industrial Chain
A numerical expression of the ratio between the force of contact existing between two surfaces and the resistant force tending to oppose the motion of one with respect to the other. The coefficient of friction is used in determining the power necessary to drive a machine; to determine the slope angles used in hoppers, bins, chutes, and bunkers; or to determine the maximum angle of inclination for a conveyor.
Coefficient of Friction - category: Conveyor
Coefficient of friction is a numerical expression of the ration between the force of contact existing between two surfaces and the resistance force tending to oppose the motion of one with respect to the other.
Cog Wheel - category: FlatTop Chain
A pulley wheel with teeth used to drive competitive plastic belts.
Comb Transfer Plate - category: FlatTop Chain
A special dead plate with "fingers" on the ends that is used with raised rib chain to accomplish smooth transfers.
Combination Misalignment - category: Coupling
Combination misalignment occurs when both parallel and angular shaft misalignment occurs. This is the most commonly observed type of misalignment in the field.
Configuration - category: Gear
Configuration is the term that expresses the shaft position or relationship. For example, a gearbox that has an output shaft at a right angle to the input shaft is described as being a right-angled configuration.
Conveyor - category: Conveyor, Industrial Chain
A horizontal, inclined, or vertical device for moving or transporting bulk materials, packages or objects in a path predetermined by the design of the device and having points of loading and discharge fixed, or selective; included is skip hoists and vertical reciprocating and inclined reciprocating conveyors. Typical exceptions are those devices knows as industrial trucks, tractors and trailers, tiering machines (truck type), cranes, hoists, monorail cranes, power and hand shovels, power scoops, bucket drag lines, platform elevators or conveyors designed to carry passengers of the elevator operator, and highway or rail vehicles.
Conveyor (Belt, Roller, Chain) - category: FlatTop Chain
A horizontal, inclined, or vertical device for moving or transporting bulk materials, packages or objects. A chain conveyor uses one or more chains to act as the conveying element. A belt conveyor uses a belt to carry materials and transmit the power required to move the load being conveyed. A roller conveyor has a series of rollers supported in a frame over which objects are advanced manually by gravity or power.
Conveyor Belt - category: Industrial Chain
A belt used to carry materials and transmit the power required to move the load being conveyed.
Conveyor Belt - category: Conveyor
A conveyor belt is used to carry material and transmit the power required to move the load being conveyed.
Conveyor Width - category: Industrial Chain
In unit handling, the dimension inside to inside of frame rails. In belt conveyors for bulk materials, the width of the belt. In vibrating conveyors, distance between side walls. In slat conveyors, the length of the slat.
Conveyor Width - category: Conveyor
In unit handling, the conveyor width is the dimension inside to inside the farm rails. In belt conveyors for bulk materials, it is the width of the belt. In vibrating conveyors, it is the distance between side walls.
Corner Disc - category: FlatTop Chain
A rotating disc used as an alternative to a sliding corner track that greatly reduces chain tension.
Curved Belt Conveyor - category: FlatTop Chain, Industrial Chain
A curved belt conveyor is a type of unit load belt conveyor usually operating horizontally through various angle turns, usually 30, 45, 60, 90 or 180 degrees.
D Style Gripper ("bubble style") - category: FlatTop Chain
A SideGrip™ Chain gripper that looks like a "D" when viewed from the side.
Dampening - category: Coupling
Dampening is reducing vibration between connected equipment and shafts. Also called damping.
Deadplate - category: FlatTop Chain
A plate that bridges the transfer gaps from one chain to another. It is usually made of stainless steel or UHMWPE. If the plate is longer than half the product diameter, the product will remain on the plate until other products push it off.
Deflection - category: Gear
Deflection is the unintended movement or change in position of a component due to mechanical force or movement. Deflection can cause wear or bending of the component.
De-rated Chain - category: Conveyor
In chain catalogs, the chains will have a rated working load capacity. De-rated is the rated capacity that may be less than the work load capacity. For example, operating conditions where the chain is subjected to elevated temperatures
DIN - category: Industrial Chain
DIN is standardization carried out by the German Institute for Standardization. DIN-ISO is the International standardization applied nationwide. Chains manufactured to American standard chains are covered by ISO606 and DIN 8187. These standards cover 3 versions: Simplex, Duplex and Triplex. The range of pitch sizes can vary between 4mm, (0.158 inch) to 114.3mm, (4.500 inch). They are characterized by a large pin diameter, especially for the larger pitch sizes. This results in better wear resistance due to the greater bearing area. The ISO standard has a simple form of part numbering, for example:
  • 1/2 inch pitch duplex chain would be 08B-2.
  • The first two digits are the pitch size in 1/16s of an inch, therefore 08 = 8/16 or 1/2 inch.
  • The letter ""B"" indicates European Standard.
  • The suffix 2 indicates the number of strands in the chain, in this case a duplex chain.
Disc Pack - category: Coupling
The flexing element of a disc coupling. It may be referred to as a “shim” pack, laminating ring, or flex element.
Discharge End - category: Industrial Chain
Location at which objects are removed from the conveyor.
Discharge End - category: Conveyor
The discharge end is the location at which objects are removed from the conveyor.
Donut - category: Coupling
The elastomeric element in donut or tire type elastomeric couplings.
Double Helical Gearing - category: Gear
Double helical gears are a type of gear with two sets of teeth cut at opposing angles, separated by a groove that runs around the center of the gear. They are used to provide smooth operations and do not produce thrust loads.
Double Pitch Chain - category: Industrial Chain
A roller chain using the same joint members as standard pitch chain and having the same dimensions except for the pitch which is twice standard.
Drag Chain Conveyor - category: Industrial Chain
A type of conveyor having one or more endless chains which drag bulk materials through a trough.
Drag Conveyor - category: Conveyor
Drag conveyors are enclosed conveyors used when the elevation of the transported material changes by using a chain guided through an enclosed trough.
Drive - category: Conveyor, Industrial Chain
An assembly of the necessary structural, mechanical and electrical parts which provide the motive power for a conveyor.
Drive Belt - category: Industrial Chain
A belt which is used to transmit power or motion from one part to another.
Drive Belt - category: Conveyor
A drive belt is used to transmit power or motion from one part to another.
Drive Chain - category: Industrial Chain
A chain used to transmit power
Drive Chain - category: Conveyor
A chain used to transmit power.
Drive Shaft - category: Industrial Chain
A main driving shaft on which conveyor sprockets, gears or pulleys are mounted. This shaft is connected to the drive unit through a coupling, sprocket, gear or other form of mechanical power transmission.
Drive Shaft - category: Conveyor
A main driving shaft on which a conveyor sprockets, gears, or pulleys are mounted. This shaft is connected to the drive unit through a coupling, sprocket, gear, or other form of mechanical power transmission. A drive shaft is also used to support the end of a conveyor screw in a trough end and as a driving connection between a conveyor screw and the power transmitting medium.
Drive Side - category: Coupling
The driver or driving shaft (motor) that moves the driven side (pump or motor).
Drive Sprocket - category: FlatTop Chain, Industrial Chain
One or more sprockets on a shaft used to drive a conveyor. The drive shaft is connected to the drive unit through a coupling, gear, or other form of mechanical power transmission.
Driven Equipment - category: Gear
Driven equipment is the machine or device that requires the power to be able to perform work.
Driven Gear - category: Gear
The driven gear receives motion from the drive gear on a machine. They often turn tools or components. Yes, this was for the gear in the gear/pinion relationship
Driver - category: Gear
The driver is the motor, engine, or turbine that provides the power needed to perform work within a system.
Dry Well - category: Gear
A  ‘No Leak’ Drywell isolates the Oil in the sump from the gear box (vertical down) output shaft, LS Lower Bearing, and the LS Lower seal effectively preventing a head of oil from forming on the lower bearing and seal. This prevents the gear lubricants from leaking out of the unit and contaminating the product that is being mixed below.
DTS (DynamicTransfer System) - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a knifed edge MatTop® Chain used to create a smooth transfer without the use of a deadplate.
DTS-C - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a patented, self-clearing 90° transfer system that combines the benefits of a comb transfer with the self clearing capabilities of a Rexnord DTS™ chain.
Durometer - category: FlatTop Chain
The international standard for the hardness measurement of rubber, plastic, and other non-metallic materials. The lower the number, the softer the material. Rexnord uses the Durometer scale to measure the hardness of chain grippers and high friction inserts.
Dynamic Misalignment - category: Bearing
Dynamic Misalignment can accommodate variations in alignment during operation
Dynamic Misalignment - category: Coupling
Dynamic Misalignment can accommodate variations in alignment during operation.
Efficiency - category: Gear
Efficiency is the measure of power transmitted by the gearbox in the relation to the amount of power put into it. Helical and bevel hearing is 98.5% - 99% efficiency per gear set. While a worm gear ranges 60-95% efficiency per reduction.
Elastomeric - category: Coupling
A coupling that has resilient materials through which the power is transmitted. They are in some way attached to the coupling halves. They are usually made of rubber, synthetic rubber or plastic materials.
Elevator - category: FlatTop Chain
A machine used to raise products to another level. Rex® SideGrip™ Chain is used on continuous-flow "Gripper Elevators".
Enclosed Gear Drive - category: Gear
An enclosed gear drive is a system of assembled gears encased by a housing that transmits mechanical energy from a prime mover to an output device. It is also referred to as a gearbox.
End Float - category: Coupling
End float is also called axial misalignment. It is a condition where shafts could be in angular and parallel alignment, but move in and out relative to each other.
Endurance Limit - category: Industrial Chain
Endurance limit, Fatigue limit, and fatigue strength are all expressions used to describe a property of materials: the amplitude (or range) of cyclic stress that can be applied to the material without causing fatigue failure.
En-masse Conveyor - category: Conveyor, FlatTop Chain
En-masse conveyors use skeletal or solid flights mounted at intervals on a cable or chain within a closely fitting casing in horizontal, vertical, or inclined positions. They are designed for bulk materials that must be enclosed to prevent leakage or explosion.
Envelope - category: Gear
Envelope is the term used for the space available for the mounting of the gearbox in the system.
Expansion Bearings - category: Bearing
Expansion (float) Bearings allow for the axial movement of the shaft relative to the housing and accommodates for thermal expansion of the shaft.
Fatigue Failure - category: Industrial Chain
Fatigue failure is defined as a material failure by means of progressive cracking under repeated alternating or cyclic stresses of a intensity considerably below the normal strength (one time load). Although the failure is a catastrophic type, it may take some time to spread depending on the both the intensity and frequency of the stress cycle.
Ferritic - category: FlatTop Chain
A grade of stainless steel that has minimal corrosion resistance, is not work-hardenable, can be easily polished, is magnetic, and is less expensive compared to the austenitic grade.
Fixed Bearing - category: Bearing
Fixed (held) bearings have axial play limited to internal axial clearance and carry axial (thrust) loads. Axial play is limited to internal axial clearance. Fluting refers to the removal of material which creates shallow grooves running vertically along a surface.
Fixture - category: Conveyor
A fixture is a device or attachment fastened to or propelled by the conveying medium. It is used for supporting or securing objects being processed as they are conveyed.
Flange - category: Coupling, Gear
The flange is the external pilot or rim used for attaching the gear reducer to another piece of equipment. The flange is the largest diameter of a coupling hub or center member. The part that contains the bolt holes that connect the disc pack.
Flight Conveyors - category: Conveyor
Flight conveyors push material with paddles attached to single or double strands of chain. The paddles drag or push pulverized or granulated solid materials along a trough.
Floating Shaft - category: Coupling
Floating shaft is a spacer shaft of varied length supported between two single flex couplings.
Floor Conveyor - category: Industrial Chain
Any of several types of conveyors using chain, cable or other linkage mounted near or flush with the floor for the purpose of assembling, or finishing built-up products and subassemblies.
Flow - category: Conveyor, Industrial Chain
Flow is the direction of travel of the product on the conveyor.
FPM - category: Conveyor
FPM stands for Feet for Minute.
Frame - category: Conveyor
A frame is the structure which supports the machinery components of a conveyor.
Fretting - category: Gear
Fretting is when two pieces of metal chemically weld themselves together due to the friction created from micro clearances that exist on all shaft mounted drives.
Fretting Corrosion - category: Bearing
Fretting corrosion is damage or excessive wear to the shaft. This damage is induced under load and in the presence of repeated relative surface motion, as induced for example by vibration. This image is an example of extensive fretting corrosion on the outer race of a deep groove ball bearing.
Gate - category: Conveyor
A gate is a device or structure by means of which the flow may be stopped or regulated.
Gear - category: Gear
A gear is a round or cylindrical mechanical component with teeth used to transmit power. Gears are designed to intersect with one another and can alter the speed, torque, or direction of mechanical energy.
Gear motor - category: Industrial Chain
A motor and speed reducer combination where the two units are flanged for connection to each other and have one output shaft; or where the two units are closely coupled with the motor resting on a base which is an integral part of the speed reducing housing.
Gear Motor - category: Conveyor
A gear motor is a motor and speed reducer combination where the two units are flanged for connection to each other and have one output shaft; or where the two units are closely coupled with the motor resting on a base which is an integral part of the speed reducing housing.
Gear Reduction - category: Gear
A gear reduction is the use of gears to reduce the speed or RPM (Revolutions Per Minute) of the driver to a speed appropriate for the driven application. This reduction also increases transmitted torque at the same ratio.
Gear Set - category: Gear
A gear set is a combination of gears intended to reduce speed and/or change the direction of power flow within the system.
Gear Train - category: Gear
A gear train is a system of gear sets used to transmit rotary motion from one part of a mechanical system to another
Gearbox - category: Gear
A gearbox is an enclosed system of assembled gear sets that transmits mechanical energy from a prime mover to an output device. This is also referred to as a gear drive or speed reducer.
Gravity Conveyor - category: Conveyor
A gravity conveyor is a roller or wheel conveyor over which objects are advanced manually by gravity.
Gravity Discharge Elevator - category: Conveyor
A Gravity discharge or “continuous” bucket elevator is designed to handle material that is larger in size than 2” in diameter up to a maximum recommended size of 8” inches. The design and spacing of the buckets allows the larger material to cascade down the backside of the preceding bucket into the discharge chute. This style elevator also allows material that is prone to breakage to be conveyed without product damage
Guard Rail - category: Conveyor
A guard rail run parallel of the path of the conveyor and limit the material or object movement in a defined path.
Guiderails - category: FlatTop Chain
Members paralleling the path of a conveyor and limiting the objects or carriers to movement in a defined path.
Heat Treatment - category: Industrial Chain
Heating and cooling a solid metal or alloy in such a way as to obtain desired conditions or properties.
Heavy Duty Chain - category: Industrial Chain
A roller chain using the same joint members as standard pitch chain and having the same dimensions except for the side plate or link plate which is equal to the next larger chain. For example, a 60 heavy duty chain will have the link plate thickness of an 80 base roller chain. These chains are designated with an H after the number such as 60H.
Helical Gearing - category: Gear
Helical gears are a type of gear with teeth orientated at an angel to the shaft. Helical gears are smoother and quieter than spur gears at high speeds. But they are more expensive and produce side loads.
Herringbone Gearing - category: Gear
Herringbone Gears are a type of gear that has angled teeth in the shape of a letter "V." They do not produce thrust loading, but are expensive and difficult to manufacture. Herringbone gears are ideal for high shock and vibration applications.
High Friction - category: FlatTop Chain
Chain with rubber inserts molded into the top of the chain links for increased friction. Rexnord now offers 2 basic types: HPM and HTF/TCF.
High Speed Shaft - category: Gear
The High Speed Shaft (HSS) is the input shaft and the rotating shaft that is driven from the power source and introduces it into a mechanical system. This is also referred to as the input shaft.
Hold Down TABs - category: FlatTop Chain
A T-shaped accessory installed under a MatTop® Chain used to return the chain or hold the chain down when transitioning to an incline.
Hollow Bore Output - category: Gear
Hollow Bored Output is a straight bored shaft with a key to mount onto the head shaft.
Hollow Pitch Chain - category: Industrial Chain
A roller chain using the same joint members as standard pitch chain and having the same dimensions except for the pin which contains a whole through the center. The hole is typically used for cross rods or customer attachments.
Horsepower - category: Coupling
The rate at which torque is applied. Since applied torque causes a shaft and its connected components to rotate, a certain RPM results. Horse Power (HP) is calculated by the following equation:
HP = Torque (lb. -in.) x RPM 63,025
Housing - category: Gear
The housing is a protective casing for a system of gears and provides an oil sump for lubrication.
HPM - category: FlatTop Chain
Rexnord terminology or nomenclature to depict chain with rubber inserts Molded on top of the chain links. The rubber inserts can be spaced at different intervals as follows: every link, every other link, every 3rd link, etc.
HTF (High Temperature Friction Top) - category: FlatTop Chain
Rexnord terminology or nomenclature to depict chain with rubber inserts molded on top of HT (polypropylene) links.
Hydrodynamic Device - category: Coupling
Hydrodynamic devices are operated by the force of liquid (water or oil) in motion to transmit rotating mechanical power.
Hypoid Gearing - category: Gear
Hypoid gears are a type of gear resembling a bevel gear in a form, but designed to mesh with a similar gear in such a way that their axes would not intersect.
Hytrel - category: Coupling
Hytrel is a thermoplastic polyester elastomer that has the flexibility of rubbers, the strength of plastics, and the processibility of thermoplastics. It can be processed easily by conventional thermoplastic processes like injection molding.
Idler - category: Conveyor, Industrial Chain
An idler is a pulley, sheave, sprockets, or wheel which a belt, cable, or chain passes in changing direction of travel.
Idler Gear - category: Gear
An idler gear is used to keep the direction of motion consistent between a drive gear and a driven gear.
Idler Roller - category: Industrial Chain
Any carrying roller of a live roller conveyor not driven.
Idler Roller - category: Conveyor
An idler roller is any carrying roller of a roller conveyor not driven.
Idler Sprocket - category: FlatTop Chain
A sprocket with an oversized bore and no keyway that can spin freely on a fixed tail shaft.
IEC - category: Gear
The International Electrotechnical Commission (IEC) provides the European standardization of manufactured electrical equipment and products used in the generation, transmission, distribution, control, and end use of electricity. IEC motors operate the same as NEMA (National Electrical Manufactures Association – North America), but they have metric dimensions.
Induction Hardening - category: Industrial Chain
Induction hardening is a surface-hardening process in which only the surface layer is heated by electromagnetic induction to transform the microstructure to get a hardened surface. It is often used in conjunction with through hardening to get a combination of both features.
Inertia - category: Coupling
The tendency of matter to remain at rest or, if moving, to keep moving in the same direction. Examples of high inertia loads are fans and fly wheels.
Inline Configuration - category: Gear
An inline configuration allows the transmission of power in line with the driver.
Inline Transfer - category: FlatTop Chain
The transfer of product from one conveyor to the next moving in a straight line.
Input Shaft - category: Gear
An input shaft is the rotation shaft that receives power from the power source and introduces it into a mechanical system. This is also referred to as the high speed shaft.
Input Speed - category: Gear
Input speed is the speed expressed in RPM (Revolutions Per Minute) of the input shaft of the gearbox.
Interference Fit - category: Coupling
It gets its name because the bore is actually smaller than the shaft it is to be mated with. It is the strongest fit possible, but requires heating the hubs to install on the shafts. Also called a shrink or press fit.
Ionized Air - category: FlatTop Chain
Air that has been passed through an electric field giving it an electric charge. This is sometimes used to clean dust off of food and beverage containers.
J Style Gripper (Jaw Gripper) - category: FlatTop Chain
The SideGrip Chain gripper that has fingers angled back.
L10 Life - category: Bearing
Bearings are rated using the L10 formula in which L10 represents fatigue life in hours with a reliability of 90%.
Below is the roller bearing L10 formula. To calculate the life expectancy in hour (L10):
  1. Divide the basic load rating by the equivalent radial load (C/9)
  2. Raise the answer it to the ten third power (10/3)
  3. Multiple by 1 million
  4. Divide the answer by the multiple of the speed (N) * 60
LBP (Low Backline Pressure) - category: FlatTop Chain
Chain with rollers on top to allow for in-line product accumulation with much lower product backline pressure than solid top, perforated, or raised rib chains.
Leaf Chain - category: Industrial Chain
Leaf chain is similar to roller chain but different enough to have its own classification called lift or leaf chain. The chain consists of roller chain link plates assembled without the use of bushing or rollers found in standard roller chain. Unlike roller chain, leaf chain uses sheaves rather than sprockets because there is no space for sprocket teeth engagement.
Left-handed Helical Gear - category: Gear
A left-handed helical gear is a helical gear with teeth that lean to the upper left when the gear is placed on a flat, horizontal surface.
Linear Motion - category: Gear
Linear motion takes place along a straight line rather than in a circle around an axis.
Load - category: Gear, Industrial Chain
Load is an expression of the amount of power required by the driven machine to perform its work. Load also is used to describe any force within a system (i.e. thrust load, radial load, torque load). Or the total weight on a conveyor.
Low Speed Shaft - category: Gear
The Low Speed Shaft (LSS) is the rotating output shaft that receives power from the mechanical system and transfers it to the output source. It is also referred to as the output shaft.
Lowerator - category: FlatTop Chain
A machine used to lower products to another level. Rex® SideGrip™ Chain is used on continuous-flow "Gripper Lowerators".
LPC - category: FlatTop Chain
(Low Pin Centerline)Rexnord terminology or nomenclature to depict a special side-flexing TableTop Chain with a unique hold down method for good corner retention that can still be lifted out of the conveyor track. The chain must be used with special Rex LPC Corner Tracks.
Lubricant - category: Gear
Lubricant is a substance used to reduce friction between two surfaces in relative motion. Oil and grease are common industrial lubricants. Lubrication reduces friction and wear between mechanical components.
Lubricant Impregnated Wood - category: FlatTop Chain
Wood or wood laminate impregnated with lubricant, which reduces friction, used to make wearstrips.
Magnetflex - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a special side-flexing TableTop Chain held down in the corners by a magnetic force between the pin or link and the permanent magnets in the corners. The chain must be used with special Rex Magnetflex Corner Tracks.
Meshing - category: Gear
Meshing is the action of interlocking with another object, such as two gear teeth. Meshing gears are used to transmit mechanical energy.
Motor - category: Gear, Industrial Chain
A motor is a machine that converts electricity into mechanical energy or motion. A motor is a type of prime mover.
Motor - category: Conveyor
A motor transfers electric energy into mechanical energy.
MTW (Molded to Width) - category: FlatTop Chain
Standard Rex MatTop Chain molded to a specific width. The widths are similar to the Rex TableTop Chain widths.
Multiple Strand Chain - category: Industrial Chain
Multiple Strand chain is standard roller chain manufactured with multiple strands are assembled together. These chains are designated with the number of strands following the base chain number. For example an 80 roller base chain with 3 strands is designated as 80-3.
NEMA - category: Gear
The National Electrical Manufacturers Association (NEMA) provides the North American standardization of manufactured electrical equipment and products used in the generation, transmission, distribution, control, and end use of electricity. These products are used in utility, industrial, commercial, institutional, and residential applications.
Nose-Over - category: FlatTop Chain
Curved or segmented frame sections having rollers properly spaced to provide a transition from incline to level or from level to decline.
Nose-Over Bar Transfer - category: FlatTop Chain
The type of inline transfer where the chain passes over a "bar" with a small radius. This is used in place of end sprockets to create a self-clearing transfer.
Nuisance Charge - category: FlatTop Chain
A charge that causes annoyance or trouble.
Nylatron - category: FlatTop Chain
A patented plastic material with high PV limits used for wearstrips.
Offset Link - category: Industrial Chain
An offset link is a type of chain that has a step in the side plate allowing for single links to be removed out of a strand of chain.
Offset Pin Hole - category: FlatTop Chain
A special pin retention method utilizing outer pin holes that are offset from the center pin holes.
Oil Sump - category: Gear
An oil sump is the reservoir that holds the lubricant in a gearbox. Typically, this reservoir is just the open space within the gearbox, not an extra design feature.
Open Area - category: FlatTop Chain
A Rex MatTop Chain that has 30% or more open area.
Open Gearing - category: Gear
Open gearing is when gears are not enclosed in a gearbox, but rather open. Large ring gears and mill pinions are an example of open gearing.
O-Ring Chain - category: Industrial Chain
The o-ring chain is named for the rubber o-rings built into the space between the outside link plate and the inside roller link plate. O-ring chain was developed to improve lubrication to the links of power transmission chains. The rubber o-rings form a barrier that holds factory applied lubrication inside of the pin and bushing wear areas.
Output Shaft - category: Gear
The output shaft is the rotating shaft that receives power from the mechanical system and transfers it to the output source. It is also referred to as the low speed shaft.
Output Speed - category: Gear
The output speed is the speed of expressed in RPM (Revolutions Per Minute).
Overhung Load - category: Gear
The overhung load is the radial (outward) force on the reducer shaft in any direction caused by chain, belt, or pinion and gear connection.
Pan Conveyor - category: Conveyor
A pan conveyors is a slow moving chain conveyor in which a series of overlapping pans or plates are attached to continuous chains.
Parallel Misalignment - category: Coupling
A condition where the shaft axis or center lines of two shafts are parallel but offset from each other.
Perforated Top: A Rex® MatTop® Chain that has between 6% and 30% open area. - category: FlatTop Chain
PET (polyethylene terephthalate) - category: FlatTop Chain
The chemical name of the material used for plastic beverage bottles (i.e. 2 liter, 20 oz, etc.).
Pillow Block - category: Conveyor
A pillow block is a bearing block or housing having a flat mounting service offset, but parallel to the shaft.
Pinion - category: Gear
The pinion is the circular gear with a small number of teeth used to engage a larger gear to produce linear motion. It is usually the smallest gear in a gear drive.
Pitch - category: Gear, Industrial Chain
Pitch is the distance between roller centers and defines the size of the chain. It is also a property used to classify gears. Pitch refers to the number of gear teeth in one inch of the gear’s pitch diameter.
Pitch Diameter - category: Gear
Pitch diameter is the diameter of a gear’s pitch circle. It can be determined by measuring from the top of the gear tooth to the bottom of the opposite gear tooth.
Plane - category: Gear
A plane is a flat or level surface.
Plug - category: FlatTop Chain
A small disk that is snapped into the outer pin holes of a Rex MatTop Chain that prevents the pin from walking out.
Pneumatic Conveyor - category: Conveyor
A pneumatic conveyor is a system that uses pipes or ducts, called transportation lines, to carry mixture of materials and a stream of air.
Positrack Tracking Guide - category: FlatTop Chain
Rexnord terminology or nomenclature to depict an accessory under a Rex MatTop Chain which rides between 2 wearstrips and keeps the chain from moving from side to side. Track widths are similar to the Rex TableTop Chain guide clearances.
Prime Mover - category: Gear
A prime mover is a machine that converts energy from a source in order to power equipment such as an engine.
PTFE (PolyTetraFlouroEthylene) - category: FlatTop Chain
A plastic additive, such as Dupout's Teflon, with very low friction properties used in Rex LF and HP chain materials. It is also used for wearstrip materials, but is only recommended for low speed applications.
Pulley - category: FlatTop Chain, Industrial Chain
A cylindrical member, but sometimes polygonal in cross section with provision for mounting on a shaft.
Pusher - category: Conveyor
A pusher is a powered mechanical device mounted on or adjacent to a conveyor that, when activated, will transfer material from or to the conveyor.
Pusher (F-Attachment) - category: FlatTop Chain
A molded vertical plastic chain attachment, perpendicular to the direction of travel, used to push product in the chain direction of travel. It is mainly used for inclines, declines, and indexing. F-Attachment follows the naming standard from roller chains.
PV - category: FlatTop Chain
The abbreviation for Pressure Times Velocity, which is used to evaluate the wear rate between sideflexing chain and inside corner wear strips.
Radial Clearance - category: Bearing
Radial Clearance is the amount of radial movement of the rings without imparting a radial load
Radial Load - category: Bearing, Gear
Radial loads act at right angles to the shaft or bearings axis of rotation. It is the force applied perpendicular to the axis of bearing’s shaft. Radial loads are also called rotary loads.
Raised Rib - category: FlatTop Chain
A chain that has a rib and groove design on top, allowing for a smooth transition from one chain to the next through the use of transfer combs.
RexFlex - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a special proprietary side-flexing Rex MatTop Chain.
Right-hand Helical Gear - category: Gear
A right-hand helical gear is a helical gear with teeth that lean to the right when the gear is on a flat, horizontal surface.
Rinser - category: FlatTop Chain
A machine used to rinse out empty containers before they are filled. The types of rinsers include Gravity, Twist, Gripper, or Rotary. The Gripper uses Rex SideGrip Chain.
Roller - category: Conveyor, Industrial Chain
A roller is a round part free to revolve about its outer surface. Rollers serve as the rolling support for the load being conveyed. The face may be straight, tapered or crowned.
Roller Conveyor - category: Conveyor
A roller conveyor is a series of rollers supported in a frame over which objects are advanced manually, by gravity, or by power.
Rotary Motion - category: Gear
Rotary motion is the spinning or turning motion that takes place around an axis, without a change in linear position.
Rotary Rinser - category: FlatTop Chain
The rotating bottle cleaner prior to a bottle filler. As it rotates, the bottles are inverted, rinsed with water, drained, and up righted.
Rough Top Belt - category: Conveyor
A rough top belt is intentionally made with irregular ridges or projections to produce a broken surface for greater traction or carrying abilities.
RPM - category: Bearing, Coupling, Conveyor
Revolutions Per Minute (RPM) is the standard measure of measuring speed of shaft, motor or an engine.
Screw Conveyor - category: Conveyor
A screw conveyor, also known as an auger conveyor, is a mechanism that uses a rotating helical screw blade within a tube to move liquid or granular material.
Seal - category: Gear
A seal is a tight closure that prevents the entrance of contaminates and retains lubrication in a gearbox.
Selective Heat Treatment - category: Industrial Chain
Many heat treating methods have been developed to alter the properties of only a portion of an object. Selective heat treatment consists of either cooling different areas of an alloy at different rates, by quickly heating in a localized area and then quenching.
Self Lubricated Chain - category: Industrial Chain
The self lubricated chain is named for the special bushing material in the roller chain design. Self lubricated chain was developed for applications that cannot tolerate maintenance lubrication applied in service. Self lubricated chains typically contain an oil impregnated or sintered steel bushing.
Service Factor - category: Gear
The service factor is a measure of periodically overload capacity at which a motor or gearbox can operate without overload or damage.
Service Factor - category: Coupling
A value associated with the ‘severity’ of an application which is used to determine the coupling size.
Shaft - category: Gear, Industrial Chain
In a mechanical system, a shaft is a cylindrical bar used to support rotating components or to transmit power or motion by rotation.
Shaft - category: Conveyor
A shaft is a bar that supports rotating parts or to transmit power.
Shaft Coupling - category: Gear
A shaft coupling is used to connect two shafts that run in the same direction and on the same centerline. The functions of a coupling are to: Connect two shafts, Transmit required torque or turning power, Accommodate unavoidable misalignment
Shaft Gap (DBSE) - category: Coupling
Shaft gap is the Distance Between Shaft Ends (DBSE).
Shaft Position - category: Gear
Shaft position is the relationship of the input shaft to the output shaft. The relationship can be inline, at a right angle, or in an offset parallel position depending on the gearbox type.
Shear Pin - category: Coupling
A protection device used on some couplings to protect driver and driven equipment against overload. The pin is located between coupling halves and is machined to break or shear at a predetermined load allowing the driver side to free wheel
Sheave - category: Industrial Chain
A sheave is the freely moving wheel that is part of a moveable pulley. The sheave usually contains a groove to hold a rope or chain. A sheave is used with leaf chain.
Shock Load - category: Gear
Shock load refers to the stress exerted on the drive during start-up or impact loads cause by repeated changes in direction or system shock loads. The service factor is one of the means for compensation for peak loads.
Shock Load - category: Coupling
Shock load is when a sudden intense force is placed on the parts of a machine. For example, the start up of a conveyor system.
Shrink Disc - category: Gear
A shrink disc is an external locking device that provides a high capacity interference fit with all the positive features of conventional interference fits, but without the assembly and dismounting problems.
Shrouded Bolt - category: Coupling
Shrouded bolt is the optional recessed bolt arrangement available on rigid and gear couplings. This design shrouds the rotating bolt heads and locknuts during operation. Bolts are installed with a socket wrench.
Side Bow Chain - category: Industrial Chain
A roller chain containing extra clearances between pins, bushings and link plates to allow the chain to side-flex or turn.
Side Load - category: Gear
A side load is a force that occurs when gears are meshed together at an angle. They can lead to deflection and wear.
Side-flexing - category: FlatTop Chain, Industrial Chain
Chain that has the ability to move sideways through turns or corners.
SideGrip - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a chain used to grip products from the side and carry them to another area. Mainly used on elevators, lowerators, and bottle rinsers.
Sideguards - category: FlatTop Chain
An accessory guard on the side of a Rex MatTop Chain used to contain bulk products on the chain.
Silent Chain - category: Industrial Chain
A type of chain with teeth on its links that mesh with teeth in the sprockets of a chain drive. A silent chain operates quietly and smoothly and is also known as an inverted-tooth chain.
Skate-wheel Conveyor - category: FlatTop Chain
A type of wheel conveyor making use of series of skate-wheels mounted on common shafts or axles, or mounted on parallel spaced bars on individual axles.
Soldered Head - category: FlatTop Chain
The end of a Rex MatTop Chain pin that is melted over to form the shape of a mushroom that holds the modules together and keeps the pins from walking out.
Solid Top - category: FlatTop Chain
A Rex MatTop Chain that has little or no open area.
Speed - category: Coupling, Gear
Speed is the rate at which material moves on a conveyor.
Speed Increaser - category: Gear
Speed increaser is a gearbox used to increase speed of mechanical energy while decreasing the torque. Speed increasers are not used as often as speed reducers.
Speed Reducer - category: Gear, Industrial Chain
A power transmission mechanism designed to provide a speed for the driven equipment less than that of the prime mover. Speed reducers may have either constant speed or adjustable speed while increasing the torque. They are generally totally enclosed to retain lubricant and prevent the entry of foreign materials.
Spider - category: Coupling
The elastomeric element of a flexible jaw type coupling. They usually have 4 or 6 arms.
Spiral Bevel Gear - category: Gear
A spiral bevel gear is a type of bevel gear with conical and curved spiral angled teeth. It is designed for smooth operation. The spiral angle of most bevel gears is 35 degrees
Splash Lubrication - category: Gear
Splash lubrication is a type of lubrication used in enclosed gear drives. The gear tooth dips into a tray of lubrication and transfers the lubrication to the meshing gear as it rotates.
Sprocket - category: Conveyor, Industrial Chain
A sprocket is a wheel with suitable shaped and spaced teeth to engage with the links of a chain.
Sprocket Designations - category: FlatTop Chain
  • KU Machined Plastic Sprocket
  • KUS Machined Plastic Split Sprocket
  • N Molded One Piece Plastic Sprocket
  • NS Glass Reinforced Nylon Split Sprocket
  • PosiClean Solid, Extruded Plastic Sprocket that extends the width of the chain
  • Semi-Steel Arm Body Cast Iron Sprocket that has spokes extending out of hub
  • Semi-Steel Block Body A solid cast iron sprocket with no open area
  • SSS Stainless Steel Split Sprocket
Spur Gear - category: Gear
A spur gear is a type of gear that has a straight, flat-topped teeth set parallel to the shaft. It transmits power through shafts that are parallel. Spur gears produce no thrust loads, but require frequent lubrication due to the sliding and rolling motion they create.
Stainless Steel - category: FlatTop Chain
A form of steel containing chromium, resistant to tarnishing or rusting associated with exposure to water and moist air. Austenitic and ferritic stainless steel are two types of materials common in manufacturing metal chains.
Static Misalignment - category: Bearing, Coupling
Static Misalignment refers to misalignment that is generally put into the system at installation.
Straight Bevel Gear - category: Gear
A straight bevel gear is a basic bevel gear, which has tapered teeth that are widest at their outer part. They are cost-effective when transmitting power between shafts at right angles.
Straight Running - category: FlatTop Chain, Industrial Chain
A chain that does not make any sideway turns.
TA Taper Bushing - category: Gear
Rexnord’s TA Taper Bushing is designed for the fit to be released from the compressing forces on the taper bushing as the nut drives the unit off the head shaft. The minimum shaft engagement allows for easy installation and removal.
TAB - category: FlatTop Chain
An L-shaped accessory installed under a chain that holds the chain down in the corners (used with rectangular corner wear strips).
Take-up - category: FlatTop Chain, Industrial Chain
The assembly of the necessary structural and mechanical parts which provides the means to adjust the length of belts, cables, chains, etc. to compensate for stretch, shrinkage, or wear and to maintain proper tension.
Take-up - category: Conveyor
The take-up is the assembly of the necessary structural and mechanical parts which provides the means to adjust the length of belts, cables, chains, etc. to compensate for stretch, shrinkage, or wear and to maintain proper tension.
Take-up Pulley - category: Conveyor
The take-up pulley is mounted on the take-up shaft.
TCF (Tough Composite Friction Top) - category: FlatTop Chain
Rexnord terminology or nomenclature to depict a chain consisting of urethane inserts molded on top of TC (tough composite material) links.
Textured Top - category: FlatTop Chain
A chain surface intentionally made with irregular ridges or projection to produce a broken surface for greater traction or carrying abilities. Used for inclined service.
Thermal Capacity - category: Gear
Thermal capacity is a specific temperature that an object can hold until it bends, melts, or changes molecular form.
Thermal Expansion - category: Coupling
Thermal expansion is the lengthening of shafting caused by temperature changes in environment.
Through Hardening - category: Industrial Chain
Through hardening is a generic term covering heat treatment processes that change the micro structure of a part through the cross section hardening of the entire part through to the core.
Thrust Load - category: Gear
A thrust load is the pushing or pulling force along the axis of the gearbox shaft which is often encountered in mixer applications.
Torque - category: Coupling, Gear
Torque is turning power. It is the force required to turn a shaft multiplied by the radius at which the force is applied. Torque is calculated by the following equation: Lb. in Torque = HP x 63,025 RPM
Torsional Density - category: Coupling
There are two main kinds of torsional vibration: a continuous steady form that comes from reciprocating engines and an intermittent form that comes from large synchronous electric motors or from the driven equipment side in steel rolling mills.
Torsional Vibration - category: Coupling
Torsional vibration is a measure of the torque-carrying capability of a mechanical component. It is a system property, since it depends on the design of each element of the component and their interconnection.
Transfer - category: Conveyor
The transfer is a device or series of devices, usually mounted inside a conveyor section, which uses belts, chains or rollers to move product at right angles to adjacent or parallel conveyor lines.
Trough - category: Conveyor
A trough is a channel generally longer that its width, open at the top, or fitted with a cover, which contains the material being conveyed.
TwistLock - category: FlatTop Chain
Rexnord terminology or nomenclature to depict an integral plug used to retain pins, which can be rotated out of the way for disassembly purposes.
Two Piece (Roller Base Chain) - category: FlatTop Chain
Rex TableTop Chain consisting of a top flight and roller base chain.
UHMWPE (Ultra High Molecular Weight Polyethylene) - category: FlatTop Chain
Most commonly used plastic wearstrip material due to its low friction, wear properties, and relativity low cost.
Unit Link (One Piece) - category: FlatTop Chain
Rex TableTop Chain consisting of only links and pins.
Unit Size - category: Gear
Unit size refers to the size of the gearbox
Urethane - category: Coupling
Urethane is a family of rubber and plastics material that is used for making molds. It is widely known for its tough properties, being abrasion-resistant, economical, relatively simple to mix and apply, and flexibility one it is formed into a mold.
Vacuum Chain - category: FlatTop Chain
Chain that has holes drilled or molded into the flights, which allows a vacuum to suck the products against the chain top surface so they can be transported to another location. The chain typically lowers, elevates, or inverts empty aluminum cans depending on the vacuum conveyor configuration.
Wear - category: Gear
Wear is the gradual removal of material on a surface caused by contact between microscopic peaks on surfaces in motion.
Wearstrip - category: FlatTop Chain
A strip used to support and guide the chain. It is usually made of steel, stainless steel, UHMWP, or wood.
Worm Gearing - category: Gear
Worm gears are a type of gear consisting of a shaft with a helical thread that meshes with a toothed wheel to transfer rotary motion between two shafts at right angles to one another. They produce thrust loads and are good for high shock load, low horsepower applications.

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