parametric gearbox module

thingiverse

There's a more up-to-date version available at http://www.thingiverse.com/thing:2320002. This parametric gearbox module is designed for building gearboxes in toys, and it includes gears with simple supports that can be easily cut off. The example of a two-stage gearbox build using this module showcases its capabilities. The small gear is specifically designed to be driven by a motor with a 2mm axis, while the output shaft is set at a hexagonal 4mm diameter.