A friend of mine wanted a gear display with lights and motion to display at his companies booth at a convention.
MDF gears painted and sealed with pre-cat laquer, then paste wax to handle the rubbing.
Gear drive with chain ring gears and chain.
I created the patterns on an online tool:
It created some pretty heavy SVGs and if I did it again I would use this as a guide and generate them through a plug-in in Fusion 360 (What I designed and CAM output to the SO3 XXL)