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

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