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Fenner
Fenner Drives Prodesco

Flat Belts

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Engineering - Formulas

Unknown Where Formula
Horsepower hp = horsepower
Td = design torque (oz-in)
rpm = motor speed (rev/min)		 hp = Td x rpm / 1.0084 x 106
Power PW = power(kw)
hp = horsepower		 PW = 0.7457 x hp
Belt Speed V = belt speed (in/sec)
Dr = pitch diameter of driveR pulley
rpm = speed of driveR		 V = Dr x π x rpm / 60
Arc of Contact (smaller pulley) ∅ = arc of contact (°)
PL = belt pitch length (in)
P = tooth pitch (in)
CD = center distance (in)		 ∅ = 180 - 57.3 x (D - d) / CD
Effective Tension Te = effective tension (lb)
Td = design torque (oz-in)
r = pulley radius (in)		 Te = Td / (16 x r)
Design Torque Td = design torque (oz-in)
Tpk = peak torque (oz-in)		 Td = Tpk / T.I.M. Factor