Back to Tools

Torsion

Loading author...

Evaluate circular shaft torsion for drivetrain, actuator, test-rig, and mechanism sizing. The model reports outer-fiber shear stress and elastic twist for solid or hollow circular shafts.

N m
m
GPa
m

Torsion

Follow the applied torque, shaft twist, and shear stress rise toward the outside fiber.

Max shear stress

20.372 MPa

At the outside radius

Twist

0.7092 deg

0.01238 rad

Polar moment

61.359

x 10^-8 m4

Solid circular shaft

T = 500.0 N m, L = 1.20 m

torque couple

Hover or tap the torque couple, twist lines, or outer fiber.

Outer radius

25.0 mm

Twist shown

0.7092 deg

Stress trend

linear with radius

Shear stress versus radius

outer fiber: 20.37 MPa

Torsional stiffness

40,394.8 N m/rad

Outer diameter

50.0 mm

Inner diameter

solid

Open Source and Easy to Use Elsewhere

This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.

Open source: review the implementation and see how the results are produced.

Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.