18650 lithium battery solder joint grinder (Openscad)

Openscad 18650 lithium battery solder joint grinder For use with a standard 6-8mm cylindrical rotary tool grinder bit with a 3mm shank. I found the stone bits more effective than diamond versions, but either can work I saw something like this on Aliexpress but could not find a place to freely download the design, so made this version. It could certainly be improved with the addition of bearings but it works well enough for my needs. 2026 Creative commons license