PAES 301:2000 Engineering Materials – V-belts and Pulleys for Agricultural Machines – Specifications and Applications

V-belt

flexible machine element used to transmit motion and power between two shafts, the cross section of which is shaped roughly like a regular trapezoid outlined by the base, sides and top of the belt

V-pulley

wheel with one or more grooved rims used to transmit motion and power by means of one or more V-belts

V-belt drive

power transmission device, which consists of one or more V-belts, mounted on two or more V-pulleys

pulley diameter

the outside diameter of the pulley

pulley pitch diameter

the diameter of the pulley, which coincides with the belt pitch

belt pitch

the region in the belt that keeps the same length when the belt is bent perpendicularly to its base

belt length

the length of the belt at the level of its pitch

speed ratio

ratio of the angular velocities of the pulleys making no allowance for slip and creep

belt speed

the linear speed of the belt at the level of the pulley pitch diameter

Nomenclature

V-pulleys can either be single-grooved or multi-grooved

1.5

The recommended ratio, l/d shall be at least ———.