Applied Torque
N·m
mm
Or Derive Torque from Power
kW
RPM
Enter a power above 0 to overwrite the torque field automatically.
Shaft Geometry & Material
MPa
mm
mm
Max Shear Stress
—
⚠️ Pure-torsion elastic formulas for preliminary sizing. They ignore bending, axial load, keyways, shoulders and other stress raisers, and fatigue under reversing loads. A real shaft usually needs a combined-loading and fatigue check.