Belting Glossary - Conveyor Belt Terms and Meanings

Two or more plied yarns twisted together.

In belt drives, the distance between two shaft centers calculated from pulley diameters and belt length being used.

A machine with three or more internally heated or cooled cylinders used to (1) continuously sheet out polymeric compound or fused PVC (2) to wipe polymeric compound into the interstices of a fabric leaving a small portion of it on the surface of the fabric, or (3) to lay a continuous sheet of compound on a fabric.

Continuous film of uncured elastomer produced from a calendar.

The curvature of a belt relative to the center line (see bow).

The maximum number of pieces, volume, or weight of material a belt conveyor can handle in a given time interval and belt speed.

A rubber protective edge placed around a product internally reinforced with textile or other material.

A belt end covered with an elastomer to protect the carcass end.

The fabric, cord and/or metal reinforcing section of any rubber product such as a belt, as distinguished from the rubber cover.

A ply or plies of fabric ruptured by impact or gouging.

The resistance of a belt against tearing.

The determination of the tension at which a belt may be torn.

See idler (2).

See top cover.

See carrying idler.

The portion of a conveyor that carries the load between the loading and discharge points.

The outward face or side of the belt which carries the conveyed material.

A film made by depositing a layer of plastic, either molten, in solution, or in a dispersion onto a surface, solidifying and removing the film from the surface.

A type of flexible belt-carrying idler with ends supported in pivoted stands. The tube or rollers sag under the weight of the load to form trough.

Conveyor Equipment Manufacturers Association.

A mixture of polymeric compound or elastomer used as an adhesive or sealant.

An application of cement around the edge of a fabricated product with or without internal reinforcement for protection or adhesion. (A form of Capped Edge.)

A belt end sealed with the application of elastomeric cement.

The horizontal roll between the side troughing rolls.

The distance between the center of two pulleys or idlers. Also called centers or center distance.

A type of bucket elevator having a belt which travels at sufficient speed to discharge material from the buckets by centrifugal force.

A relatively open weave duck of approximately square woven construction made with single or ply yarn.

Formation of a powdery surface condition due to disintegration of surface binder or elastomer due in turn to weathering or other destructive environments.

Short shallow cracks on the surface generally due to effect of destructive action of environmental conditions.

A ridge or profile arranged in a Vee shaped configuration on a belt carrying cover to stabilize material carried up an incline.

Highly abrasion resistant elastomeric lining in a chute to protect the metal chute from abrasion wear.

Angle relative to the horizontal a chute is inclined.

Transverse raised sections on a conveyor belt to stabilize material carried up an incline.

A moving, endless conveyor belt formed into a tubular shape by joining its edges while carrying material, and opening the edges while in motion to receive and discharge material.

See fabric impression.

A flat disc idler with several discs adjacent to each other at the ends of the idler.

The ratio of the force required to move a package across a belt surface to the weight of the package.

A tooth on the rim of a wheel or rubber product.

A V-belt cut or produced with a series of evenly spaced V-shaped indentations in the inner face to increase the belt’s flexibility.

Tendency of a material to stick to itself.

Usually a squared end belt piece of full manufacturing length but not full manufacturing width. See also slab belting.

chemicals

The introduction of plastic pellets into processing equipment without milling.

See low temperature flexing.

The relative ease of bending following exposure to low temperature.

Continued deformation under stress. See Creep.

Usually the joining of two or more sub-straits together, using a two-part cement that is chemically cured without using supplemental heat from an external source.

A degree of smoothness of an article which is acceptable in accordance with industry practice.

A mixture of a polymer(s) and other materials to give the desired chemical and physical properties in the elastomeric components of a belt.

The portion of a belt beneath the pitch line as the belt bends around a pulley.

The deformation in a material remaining after it has been subjected to and released from a compressive force.

Quality of power of conducting or transmitting heat or electricity.

When staining occurs on the area of an object directly in contact with the rubber article it is known as “contact stain”.

A bucket elevator belt that discharges by gravity over the inverted bottom of the preceding bucket on the descending side of the elevator.

A material or a product of known characteristics included in a series of tests to provide a basis for evaluation of other products.

A system for the continuous movement or transport of bulk materials, packages or objects along a predetermined path.

A belt that carries materials from one place to another.

A mechanical diverter placed at an angle across the belt to deflect packages off the belt at specific locations.

The increase in belt length which occurs when tension is imposed. Stretch is either elastic or permanent. Elastic stretch is a temporary change in length which varies directly with the pull. Permanent stretch is the residual change in length after tension has been removed; it generally accumulates over a period of time.

In belt conveyors, the width of a belt.

A substance consisting of molecules characterized by the repetition of two or more types of monomeric units.

Several strands of yarn twisted together.

A belt with inserted textile or steel cords for the longitudinal tension-bearing member.

A fabric with plied or cabled yarns in the warp direction and a light weight filling yarn spaced only sufficiently to process the fabric.

A natural fiber of high cellulosic content.

In a fabric, the number of warp ends, the number of filling picks, or both in a square inch of fabric.

In conveyor belting, the weight applied to the take-up assembly to maintain proper belt tension.

The outer component of a belt.

See cover splice.

The transverse joint formed by connecting two lengths of cover stock.

A cross-sectional view of the cover surface.

The loss of material during use due to abrasion, cutting or gouging.

A sharp break or fissure in the surface. Generally due to excessive strain.

A small shallow surface imperfection.

A cover surface with many fissures.

(1) The deformation occurring with the lapse of time in both cured and uncured rubber, in a body under stress in addition to the immediate elastic deformation. Some related terms and properties are stress-relaxation, hysteresis, damping, flow, compression set and viscosity. See Cold Flow.

An auxiliary drive, usually consisting of a small motor and speed reducer, used to keep a belt conveyor in motion at a very low speed during non-operating periods in extremely cold weather. It is used to prevent freezing of a belt and other components.

The difference between the diameter at the center and at the edges of a pulley or a roll.

A pulley with a greater diameter at the center, or other points, than at the edges. There are radial and trapezoidal crowns. Apex crowns are not recommended for industrial belts.

A change in physical properties resulting from the crystalline reorientation caused by temperature.

The act of vulcanization.

Time required, at a given temperature, to produce optimum physical properties in an elastomer.

The temperature at which the rubber product is vulcanized.

The action of the edges of a belt bending upward on the carrying run and downward on the return run. Also called cupping.

A leno or cord breaker imbedded in a belt cover.

See cut edge.

The uncovered edge of a laminated product, such a belt, created by cutting after vulcanization.

The ability of a belt cover to withstand the cutting action of sharp objects.