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Contracts
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Drive Friction Factors

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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.

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