Barry & Robert cleaning a gear

Rhinoscript 'Involute Gear Generator' by Thomas Anagnostou.
Add Shaft and Key-way.
Extrude to get 'solid model gear'.
Add and array a 'rhino' hole.
Cage Edit to 'dome' the model.
Create a mesh model.
Export the mesh as a 'closed' stl mesh for 3d printing.