If you’re reading Hackaday, there’s a good chance you had a rock tumbler in your younger days. Hell, we’d put odds on a few of you having one rumbling away in the background as you read this. They’re ...

Position the Glass or Tumbler: Adjust the rotary axis to the right position for your glass or tumbler. Insert it into the rotary fixture, ensuring it’s centered and balanced to rotate smoothly. Adjust ...