PUT A DAZZLING POLISH ON YOUR ROCKS with Polly Plastics rock tumbler grit and polish refill. Our one-of-a-kind rock polisher kit contains four different kinds of grits to provide initial shaping ...

Load balancing refers to the even distribution of contents in your rock tumbler. This includes rocks, filler material, and ...

If you’re reading Hackaday, there’s a good chance you had a rock tumbler in your younger days ... Pulsing the electromagnet pulls down the large 3D printed spring, which imparts not only ...