Shaft Size Calculator
Free calculate minimum shaft diameter from torque and allowable stress. determine d = (16t/(πτ))^(1/3) for solid circular shafts.
Input Parameters
Typical: Steel ~50-100 MPa, Aluminum ~30-50 MPa
Factor to increase safety margin (typically 1.5-3)
Results
Enter parameters to calculate shaft diameter
Shaft Size Formula
Formula
d = (16T / (πτ))^(1/3)
Where:
- • d = shaft diameter (m)
- • T = torque (N·m)
- • τ = allowable shear stress (Pa)
Torsional Stress
τ = 16T / (πd³)
For solid circular shaft