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SOLID MODELCAD & 3D Modeling5-Mar-2026

Simple Expandable Gearbox

Quinn_3dprints
Quinn_3dprints
6 Files
stl Format

Description

I'm building this gearbox as a tiktok series where I add one gear every episode, and now the models are available so you can do it yourself!

The gear provided has a 60:20 gear ratio, or simplifed 3:1. This means that if one gear spins one time, the other one spins 3 times as fast. If you add more gears, the ratio will increase exponentially. For example when you have a total of 10 gears, and spin the last one, the first gear spins 59049 times as fast!

Update: I have remodeled the gears, they are way better now. Please know that the new gears are NOT compatible with the old gears/the spacer. The sideplates and axles have stayed the same and are compatible with both the old gears and the new gears.

INSTRUCTIONS:

-YOU NEED TO PRINT 2 SIDEPLATES! (one called sideplate_2 and sideplate+axle___mm!!!

-You can add as many gears as you want. If you want a version with a longer axle, just tell me and ill publish the file!

-Supports are not needed

-Assembly is easy and doesn' t need any instructions.

I also added a additional spacer gear, but it is not necessarily needed.

THE TEXT ON THE GEAR IN THE COVER PHOTO IS REMOVED ON THE MODEL!

Downloads

GearBox_SidePlate+Axle250mm.stl
20.5 KB
GearBox_SidePlate+Axle150mm.stl
20.5 KB
GearBox_SidePlate+Axle100mm.stl
20.5 KB
GearBox_SidePlate_2.stl
20.0 KB
GearBox_SpacerGear.stl
395.4 KB
GearBox_RemasteredGear_1.stl
1.3 MB
Simple Expandable Gearbox | Solids Ranch — Tinkster