Floor grinders use large rotating disks designed ... of burrs after cutting a piece of metal, finishing and polishing surfaces, and sanding. You'll want a belt grinder if you plan to do any ...

variable-speed belt grinder. Apparently, disused fitness devices make an ideal framework to build your own tools: Strong metal frames, plentiful adjustment guides, and strong treadmill motors.

He’s even added a spring-powered tension device to ensure the belt stays on. As for mounting the angle grinder in place, it couldn’t be easier. It slides in between two metal guides ...