Shaft Keyway Size Calculator

Select Metric or Imperial, enter the shaft diameter, and identify the standard key cross-section.

Shaft information

mm

Supported range: over 10 mm to 230 mm inclusive.

Recommended standard key
Awaiting input
Important: Shaft ranges follow the chart convention “over” the lower limit and “to and including” the upper limit. This tool identifies the standard key cross-section only. Key length, material, tolerances and load capacity must be checked separately for the transmitted torque and application.