Modular Planetary Gearbox Reducer / Increaser

UPDATE: I have also added a fan propeller so that you can mount it in the front side! Enjoy!

Looking for a fun and flexible way to experiment with gearing? This modular planetary gear system is designed to be printed, stacked, and customized to fit your needs! Each single-stage unit provides a 4:1 gear ratio, and by stacking multiple units, you can create unlimited gear reductions or increases.

Why You’ll Love It:

Easy to Use – Comes with a handle for manual rotation, but also includes a slot-cut shaft so you can mount a motor, pulley, or any other accessory!
Optimized Gear Design – Features 15-tooth sun and planet gears and a 45-tooth ring gear for smooth, reliable performance.
Modular & Stackable – Print multiple units and stack them to reach any gear ratio you need!
3D Print-Friendly – Designed for FDM printing with minimal supports, so you can get great results with ease.
Endless Possibilities – Great for robotics, mechanical projects, educational experiments, or just having fun with gears!

Perfect for makers, engineers, and curious minds, this planetary gear system is a cool and practical way to learn about gearing and build something awesome. Download it now and start experimenting!