PangPang ToolsShaft output (kW): 5.5, Shaft speed (rpm): 1750
Torque: 30.012075 N·mUsing these sample input values gives the first labelled output above. Enter actual mechanical shaft output rather than electrical input power.
Construction & Electrical
Motor Shaft Torque Calculator
About this tool
Motor Shaft Torque Calculator performs a browser-local calculation using measurements and quantities you control. The results are presented as labelled figures so each number is easy to interpret. Enter actual mechanical shaft output rather than electrical input power.
Motor speed & shaft torque
Choose a task. Inputs stay in this page only.
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Result
Worked examples
Questions & answers
Can I use the default numbers for purchasing or safety certification?
No. Replace the examples with your real values. Enter actual mechanical shaft output rather than electrical input power.
MAKE IT SIMPLE
Result
Worked examples
60 Hz; 4 poles
Synchronous speed 1,800 rpm; 3,600 cycles/min; 2 pole pairs120 × 60 ÷ 4 = 1,800 rpm. A four-pole induction motor generally runs below this under load.
50 Hz; 6 poles
Synchronous speed 1,000 rpm; 3,000 cycles/min; 3 pole pairs120 × 50 ÷ 6 = 1,000 rpm. Changing pole count or frequency changes the rotating-field speed.
Questions & answers
Why is the nameplate rpm lower than this result?
For an induction motor, slip is required to produce torque; the rotor commonly turns below the rotating field's synchronous speed.
What frequency should I enter for a VFD-fed motor?
Use the drive's actual output electrical frequency at the operating point, not necessarily the fixed utility mains frequency.