Quick and Easy Black Powder Ball Mill — Skylighter, Inc.
How to optimize a 6 pound ball mill to safely and effectively ball mill homemade black powder. Here's Your Next Ball Mill What is a ball mill? ... There you go: A larger, 3/4-inch diameter drive roller, simple as that. Test-run the mill with a jar on it, and verify that the speed of the jar's rotation has increased to approximately 80-90 RPM.