[Lab] make a timing pulley

[Darcy Whyte]

I'm just about to go to General Bearing Service to pick up a timing pulley.
Once I have it and I complete my A-Axis for my mill I will be able to make
pulleys.

Does anybody know the exact shape of a timing pulley? I don't care about the
flanges, just the teeth. Perhaps I could try and make one with a 3-Axis
mill? Is there a code generator for that around? Or some shapes that will
work?
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