youtube ball mill,Ballmill.mpgFeb 14, 2009 . If anyone wants to know the actual optimal speed needs to read the book on theory of ball mills by L. Sponenburgh. Very informative and he.youtube ball mill,Ball Mill (Home Made)Jan 31, 2008 . I put this ball mill together using a second hand 12 volt motor ($20NZ) and a few old scraps from around the workshop. The tin holds 1 litre.