N20 micro gear set M1 - 36 involute spur gears for 3 mm shaft: D-bore, hex, idler + test stand

A complete **module 1 gear library for small mechanisms**: 12 tooth counts x 3 bore types = **36 gears**, built around the **3 mm shaft of N20 / GA12 micro gear motors**. **Three bore types, same teeth - they all mesh with each other** - **D-bore 3 mm + hub with M2 set screw** - goes straight onto an N20 motor shaft (flat at 2.5 mm) - **hex bore 3 mm** + printable hex axle - torque through the flats, no screws - **round 3 mm idler** - spins freely on a 3 mm axle or steel pin **In the set** - mo…

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