Compact Planetary Gearbox

A 40mm x 40mm x 34mm Planetary gearbox designed to be mounted to a Nema 17 motor. It's gear ratio is 4.444:1 (40:9 for those who dislike decimals).

Version 2

Now supports an M8 bolt for the output by default.

Changing the output size no longer requires reprinting the entire assembly - just print the top half of the planet frame, and the cover.

If you want the M6 version, print m6_output.stl as well.

If you've already printed the M6 version, and want to convert it to M8, print m8_output.stl.

Warning! This is difficult to print. Unlike Jag's design it doesn't have a lot of overhangs, but the gear teeth require a lot of precision.