Herringbone Planetary Gear

This is a super simple and fun design that is really smooth to spin.


Feel free to download, share, copy, edit and re-upload edited versions.


It will work (although not as smoothly) with four planet gears.
The carrier gears fit the teeth on the outside and there are holes, and one square through the middle of the ring gear (outer ring-shaped gear) so that they can be connected together in a string to improve the gear ratio.

It fits an 8mm allen key with a low resolution print so might need a slightly bigger size for bigger prints.