Motor Torque Calculator
Calculate required motor torque from load mass, speed, acceleration, and gear ratio for robotic joint actuators.
Inputs
lb
mm
m/s
s
Results
Required Motor Torque
0.86 N·m
Gravity Torque19.62 N·m
Acceleration Torque8 N·m
Friction Torque0.98 N·m
Motor Speed2,387 RPM
Power Required214.5 W
How to Use This Calculator
- Enter load mass (kg), robot arm length (m), and maximum tip speed (m/s).
- Set acceleration time (sec) to achieve maximum speed and friction coefficient at the joint.
- Enter gear ratio if a gearbox is used between motor and load.
- Review required motor torque (N·m), gravity torque, acceleration torque, and friction torque components.
- Select a servo motor with rated torque exceeding the required value including a safety margin.
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