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.
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
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
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.
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.
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
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
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.