Torque and Power Calculator
Quickly analyze basic mechanical quantities in AC, DC, and servo motor applications. Send the result to our engineers or upload your old motor nameplate to request an equivalent motor.
Torque Calculation
T = 9.5488 × P / nPower Calculation
P = T × n / 9.5488Nameplate Reading and Equivalent Request
Your old motor's nameplate might be faded, dirty, or hard to read. Upload a photo of the nameplate, add your technical notes; the ONX Control team will analyze the data and prepare suitable motor/drive alternatives for you.
Engineering Expert Window
Torque and duty cycle: The calculated torque value alone is not enough. The application's starting regime, duty cycle, peak load duration, and gearbox ratio are decisive in selection.
Thermal stability and low speed: In applications requiring high torque at low speeds, the motor's cooling efficiency may drop. An external fan option should be considered, especially in inverter-controlled usage.
Engineering FAQ: Motor and Mechanical Selection
Why does the motor power unit switch between kW and HP?
kW is more common in European motors; HP is used in some imported or US-origin products. The conversion is approximately 1 HP ≈ 0.746 kW.
When is it necessary to use a gearbox?
Gearboxes are used to reduce the motor speed and increase its torque (mechanical advantage), and to provide inertia matching. It is essential for stability, especially when the load inertia is very high compared to the motor inertia.
What are the consequences if the motor torque is insufficient in the system?
The motor cannot reach the desired speed, it reaches a "stall" point under load, or the drive protects the system by giving an overcurrent error. Mechanically, slips occur in the system.
ONX Tech Summary
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