I designed this ball mill using Inkscape. I cut it on the new Glowforge laser cutter that Mad Scientist Hut received. It uses a porcelain jar and ceramic balls to keep from contaminating the material being milled.

 

See the video here:

https://www.youtube.com/edit?o=U&video_id=muSKFcst_FU

If you want design files I can provide them click here:

https://madscientisthut.com/wordpress/contact-us/