Generate a shaft with a keyway
A round shaft with an axial slot cut into it. The key sits half in the shaft and half in the hub, transmitting torque positively rather than relying on friction.
What it is used for
- Power transmission shafts
- Motor and gearbox output shafts
- Pulley and sprocket mounting
- Coupling connections
Dimensions that matter
| Diameter | Sets torsional capacity — torque capacity rises with the cube of diameter. |
| Length | Overall shaft length. |
| Keyway width | Must match the key and the mating hub's keyway. |
What you get
A real solid model you can rotate and measure, plus downloadable STEP (machining and CAD), STL and 3MF (3D printing) and DXF (laser and waterjet) files. Optional built-in analysis covers stress (FEA), thermal, buckling, cost and manufacturability.
Before you see it, the built geometry is measured against the dimensions you stated, checked as a valid watertight solid, and — for assemblies — checked for interference. These are geometry and physics checks; they do not confirm the shape matches what you pictured, so review the 3D view or 2D drawing before relying on the part.
Previewing is free. Downloading is £2.99 per part, or unlimited on Pro (£29/month, £290/year).
Related parts
Common questions
What file formats do I get?
STEP, STL, 3MF and DXF — the formats CNC shops, laser cutters and 3D printers accept.
Can I change the dimensions afterwards?
Yes. Edit the numbers directly, or describe the change in plain English. Every edit is rebuilt and re-checked.
Do I need CAD experience?
No. Describe the part and its sizes in millimetres.
Is it free to try?
Yes — describing a part and viewing the 3D preview costs nothing.