Last updated: August 25, 2026
Quick answer: Enter motor power, rated input speed, ratio and estimated efficiency. Add machine torque and service factor to check preliminary torque margin. The result does not replace the selected gearbox's mechanical and thermal ratings.
Calculate gearbox output
Rated shaft output power
Use rated rpm
Enter 30 for 30:1
Confirm against selected model data
Continuous driven-shaft torque
Reflect duty, starts and shock
Output speed46.7 rpm
Estimated torque107.4 Nm
Design torque87.5 Nm
Preliminary estimated torque exceeds design torque. Verify catalog and thermal ratings.
Formulas and buying information
Output speed = Input speed ÷ Ratio
Estimated torque = 9550 × Power × Efficiency ÷ Output speed
Design torque = Machine torque × Service factor
Minimum order quantity2 units
Typical standard-order lead time3 days
Final availability and delivery time depend on model, ratio, motor, mounting configuration, quantity and stock confirmation.
Use this result as a preliminary check only. Verify rated torque, thermal capacity, shaft loads, mounting position and motor interface. Read the selection guide, see the NMRV product range, or review the calculation guide.