Engineering tool · torque and power
P = 2πnM / 60Friction Torque, Power & Heat
Estimate bearing torque from a simplified coefficient or sum known torque components, then convert to power loss and heat generation.
Rotational loss
Calculate torque and heat
Use component mode when a manufacturer calculation supplies rolling, sliding, seal or drag torque. Coefficient mode is a coarse screening estimate.
RESULT / 03
Power loss
Steady-state mechanical loss
Frictional power / heat—mechanical loss assumed converted to heat
Total torque—at the entered condition
Power loss—kilowatts
Angular speed—rad/s
Daily energy loss—kWh/day
P = 2πnM / 60
Calculation method
Torque drives thermal loss
Mechanical power loss is torque multiplied by angular velocity. At thermal equilibrium it must be removed through the housing, lubricant and surroundings.
01 / ESTIMATEM ≈ μPdm/2 + Madded
The coefficient model is suitable only for rough comparison and early sizing.
02 / POWERPloss = 2πnM / 60
The result in watts is also the approximate heat-generation rate.
03 / LIMITReal friction has multiple sources
Use the exact manufacturer's rolling, sliding, seal and drag model for final thermal design.