How to make a cheap ball mill : r/Pyrotechnics
WEBAs for the mill, if you're handy with electronics and have a motor, an old computer power supply, and a cylindrical plastic container laying around, you can DIY something pretty cheap. If you'd rather not mess with electronics, there are ball mills available on eBay or AliExpress for ~6070. For media you can melt old wheel weights and cast ...