Commonly Used Belting Terms

Adhesion - The clinging, bonding or sticking of two material surfaces to one another.

Breaking Strength - The tensile which the textile yarn or cable, a steel cord, or a belt is at rupture; also called tensile strength.

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

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

Compound - A mixture of polymer(s) and other materials to give the desired chemical and physical properties in the elastomeric component of belting.

Cover(s) - The outer component(s) of belting.

Crowned Pulley - A pulley with a greater diameter at the center, or other points, than at the edges.

Durometer Hardness - A value which measures the resistance to penentration of an instrument into vulcanized compounds.

Elongation - The measurement of increase in length, expressed as a fraction or percentage of initial length.

Fabric - The structure produced by non-woven, or inter-woven yarns, fibers or filaments.

FDA - The governmental organization known as the Food and Drug Administration.

Interwoven - A type of belt construction similar to that of a solid woven belt, with plies interwoven such that it is impossible to separate them.

Lagging - A smooth or embossed covering on a pulley to increase friction between the belt and the pulley.

Live Roller - A series of rollers over which objects are moved by application of power to all or some of the rolls.

Modulus - Refers to one of several measurements of stiffness or resistance to deformation. 

Monofilament - A single extruded strand of material.

Multifilament - Many extruded fine strands of material group together.

Roller Bed - A conveyor bed that is formed by a series of rollers.

Saddle - An additional short length of belting added to an existing belt for repair.

Skim - A layer of compound applied to a fabric.

Slab Belting - Belting made in wide widths and long lengths for later slitting into narrower widths and cutting into shorter lengths.

Slider Bed - A stationary surface on which a belt slides.

Slit Belt - A belt cut to lesser width.

Snubber Pulley - A pulley adjacent to a drive pulley that increases the arc of contact on the drive pulley to increase the effectiveness of the drive.

Tail Pulley - The belt pulley near the loading end of the conveyor system.

Tension Rating - Maximum safe working tension recommended by the manufacturer.

Thermoplastic - Capable of being repeatedly softened by heating and hardened by cooling and in the softened state can be shaped by flow.

Troughability - The property of a belt that permits it to conform to the contour of troughing idlers.

USDA -The governmental organization known as the United States Department of Agriculture.

Vulcanization - A heating process during which a compound becomes less plastic and causes changes in the physical and chemical properties; a general term used when heat and pressure is used to cure an endless splice.

Warp Yarns - The yarns that run lengthwise in a woven fabric or belt.

Weft (fill) - The years that run widthwise in a woven fabric; also called fill(ing) or cross yarns.

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