Non-circular Gear

Non-circular gear come in many shapes. They seem to defy the laws of motion. It really doesn't look like they are going to mesh at all, but somehow they do. That's why I think they are so cool. Here's an OpenSCAD script, which generates involute gear from elliptic curves. Also included are STL files for a collection of gear that mesh. It is possible to combine any two gears from this collection.

Using the Customizer (Open in Customizer) you can create your own collection of non-circular gears, of a different shape.

[](https://youtu.be/efDwzioqthY)

Edit: 2020-02-22 Added 2D (.SVG) files for cutting/milling.