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Drive Friction Factors

Belt conveyors utilize a friction drive and accordingly, when power is applied to the drive system, one run of the belt will experience a higher tension than the other. The amount of slack side tension required to prevent slippage at the drive is a function of several constant factors amongst others is the coefficient of friction between the drive system. Below is a list of standard drive pulley friction factors from various design catalogues and standards.

Friction Factor (Min) Friction Factor (Max) Description Reference
0.8 0.8 pulleys lagged with ceramics CMA
0.35 0.35 Wet Lagged CEMA
0.35 0.35 dry lagged pulleys CMA
0.4 0.45 Dry Lagged REMA TIP TOP
0.35 0.35 Lagged STEVENS ADAMSON
0.35 0.35 Lagged CEMA
0.35 0.35 Dry Lagged CEMA
0.35 0.35 Wet Lagged REMA TIP TOP
0.25 0.3 Wet and Dirty Lagged REMA TIP TOP
0.35 0.35 Wet Lagged STEVENS ADAMSON
0.35 0.35 Dry Lagged STEVENS ADAMSON
0.6 0.6 Dry Lagged LINATEX
0.35 0.35 Wet and Dirty Lagged CEMA
0.4 0.4 Wet and Dirty Lagged LINATEX
0.35 0.35 Rubber surfced belt driving rubeer lagged pulley surface CEMA
0.25 0.25 Bare Pulley CEMA
0.2 0.2 Wet and Dirty Lagged BRIDGESTONE
0.35 0.35 Bare Pulley STEVENS ADAMSON
0.35 0.35 Dry Lagged BRIDGESTONE
0.35 0.35 Wet and Dirty Lagged STEVENS ADAMSON
0.1 0.3 Bare Pulley BRIDGESTONE
0.2 0.3 Wet Lagged BRIDGESTONE
0.25 0.25 Rubber surfaced belt driving bare steel pulley CEMA
0.8 0.8 Wet Lagged LINATEX
0.2 0.2 Bare pulley running in water CMA
0.5 0.5 Dimpled Ceramic or equivalent hard material CEMA


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