Cheap and Simple Ball Mill : 10 Steps Instructables
Balls for the mill (ideally lead balls) Tools: Drill; 5/16" drill bit (or whatever the diameter of your threaded rod is) Wrench for the locking nuts; Hacksaw; ... Now you get to put your new ball mill to use. Try to find some lead balls, since they are heavy and won't spark. I was unable to get lead balls at the time and tried using plastic BBs ...