Calculate brake torque at each wheel from caliper clamping force, pad friction, and effective rotor radius.
Input Parameters
Results
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Clamping Force
lbs
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Total Friction Force
lbs
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Brake Torque
ft-lbs
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Effective Radius
in
Note: Brake torque must exceed wheel torque from engine and grade forces. Larger rotors increase torque via a longer moment arm without increasing line pressure.
Reference
Effective Radius = (Rotor Dia / 2) - (Pad Width / 2)
Clamping Force = Line Pressure x Piston Area
Friction Force = Clamping x mu x 2 (both pads)
Brake Torque = Friction Force x Effective Radius / 12
Result in ft-lbs