Ball Mill from mainly recycled parts

Step 10: Optional Step

This is optional but is highly recommended as it alows the container to rotate much smoother. cut another piece of wood that is 3/4 the diameter of your container and mount it as shown in the picture (the green box is where to mount it) pointing up forming a 90 degree angle with the base on each side. get a rotatable wheel like from a file cabinet and add it to the top of the new board to the container will hit against it.