This is a ball mill used for refining materials into a fine powder. [Jpoopdog] built it in two parts, a base and the tumbler chamber. The base itself is build using LEGO wheels as rollers.

Whether it's smooth rolling or unpredictable chaos, these Lego ball-bots are a new frontier in robotic fun! Mini toys Posted: February 3, 2025 | Last updated: February 3, 2025 ...