Parametric Bearing Gear Toy

A parametric gear toy based on the [parametric spur gear](https://www.thingiverse.com/thing:3336641), using small bearings. The four gear teeth counts and bearing dimensions are adjustable parameters. The default settings yields a gear ratio of approximately 3 from the outside to inside gear, and uses MR104-2RS (4mm ID x 10mm OD x 4mm W) bearings. The bearings are press fit into the gear assemblies and onto the frame shafts.

See the [parametric gear toy](https://www.thingiverse.com/thing:3336