Poor Mans Ball Mill : 4 Steps Instructables
Step 2: Prepare the Tub. put a washer on the bolt and push it through the lid so the shaft of the bolt is on the outside. then put a washer on the bolt and put the nut on the bolt and tighten it up. that's it, for the tub, just pour in the medium you wish to grind and put in the lead balls, screw the top on and move to the next step of this ...