400:1 (3600:1) external gear planetary gearbox

thingiverse

I wanted to create a high ratio planetary gearbox that uses external gears only, for 2 reasons: - easier teeth clearance tuning, - in the future should be possible to replace 3d printed gears with on-shelf metal gears. The gearbox uses external gears, 1 and 1.25 teeth module. The planetary ratio is 400:1, total ratio 3600:1. Non printed parts: - 6 bearings 625 - 1 bearing 5201 M3 screws and nuts (8+8), M5x25 bolts (3) M5x65 bolts (3) M5 nuts (6) For testing purposes I used GM3408H BLDC motor and an [original driver package](https://github.com/kwahoo2/bldcMortar-drive). There is optional output for LPD3806 encoder. Satellite gears placement is important. Please check the STEP file to learn more. Note: process of support removal from planetary carrier (input_bracket.stl) is not fun at all and needs some patience.