I’m not sure if anyone needs it, but since I needed to make some custom sprocket models for my own project I wrote some code to generate STL models of gears and/or sprockets parametrically. The site is called sp-rocket.com, and I released the source code on github if you’re curious about how it works: (https://github.com/smeans/sp-rocket). Hope someone finds it useful!

thanks, that’s looks nice, but is there a way to create an “inversion” of a sprocket, a sort of template that for example a sprocket freewheel would sit on it?

The site sp-rocket.com is down, I downloaded the git files but I don’t know how to run it on my computer, please help me, is this project still active?