From the Loftsmith community

20T spur gear, 5 mm bore

A small toothed wheel for passing motion from one shaft to another, like a hobby motor to a wheel or a hand crank. It has twenty teeth and a round hole sized for a 5 mm shaft. Change the tooth size or the hole to match your own parts.

1 part · 4 g · 33 × 33 × 8 mm