This parts tumbler was easy to build but it still does a great job of rounding rough edges and polishing the surfaces of parts cut with a CNC machine. You can see that it mounts in a bench vise ...

Even the busiest bees have time to make these easy bespoke napkin rings. It’s not every day that you break out the nice ...

They’re relatively simple contraptions, and a common enough DIY project. But even still, this largely 3D printed rock tumbler from [Fraens] is unique enough to stand out. To make a basic rock ...