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Manufacturers of hydraulic components and test equipment for the Mobile, Industrial and Agricultural Industries

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Hydraulic Motor Torque Required

IMPERIAL

Hydraulic Motor Torque Required

The torque required to slip the wheels is the vehicle weight over the driving tyres times the coefficient of friction of the driving tyres on rolling surface times the rolling radius of tyres divided by the overall gear reduction.

diagram

Where:

VW = Vehicle weight over driving tyres (lbs)

U = Coefficient of friction of tyres on average road surface, generally 0.6.

r = Rolling radius of loaded driving tyre in inches.

R = Overall gear reduction in both axle and transmission.

METRIC

Hydraulic Motor Torque Required

The torque required to slip the wheels is the vehicle weight over the driving tyres times the coefficient of friction of the driving tyres on rolling surface times the rolling radius of tyres divided by the overall gear reduction.

diagram

Where:

VW = Vehicle weight over driving tyres (kg)

U = Coefficient of friction of tyres on average road surface, generally 0.6.

r = Rolling radius of loaded driving tyre in millimetres.

R = Overall gear reduction in both axle and transmission.