Gear cutting is one of those things that seems super complicated until you do it. So I did it.
A 13-tooth gear, milled in aluminum. Not awesome, but a decent start.

The set-up on the Bridgeport: a rotary table, a chuck holding the work, and an indicator on a magnetic arm.

A small steel pinion on its shaft. This was a sort of test piece for an idea one of the robotics team's mentors had.

A version I 3D printed for comparison purposes.
