This is a library of small, matching gears intended for 3D ABS extrusion printing, I use these to make my own gear boxes.
I needed gears for some of my projects and eventually wound up creating this set, which I've dubbed "Gear Set 1", and created a reference chart to aid in the pairing of its gears.
These gears are scaled to the smallest size I could print while still getting something that actually worked. To pair the gears up please refer to the attached PDF for the necessary dimensions.
If you would like further details check out the accompanying instructable for all the sweet details you can handle: