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Planetary gearbox

A working planetary gearbox, designed in CAD, built by me and driven by a cordless drill.

Role
Design and build
Context
Personal project? Add the year.
Tools
CAD program, 3D printer or machine used.
Key figures
Gear ratio, number of teeth, module, material.

Goal

Why did you build it, and what should it be able to do?

Photo or video of the finished gearbox
Gearbox driven by a cordless drill

Design

How the gearbox is laid out: sun gear, planets, ring gear, carrier. One or two sentences on the main decisions and why.

CAD render or exploded view
CAD model of the assembly

Build and test

How you made the parts, what went wrong, what you changed.

What I learned

Two or three sentences.

Files

Optional: link a STEP file for download once you decide to share it.