Make a Ball Mill in 5 Minutes : 4 StepsБидэнтэй холбоо барина уу +
This is the most important step. The joint holding the the container and electric screwdriver should be strong and able to hold the weight of the assembly. Put a little putty on the bolt first. Insert the bolt into the screwdriver''s bit holder. Cover the whole joint with putty. The more putty the better the ball mill stays together.