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.

As many of you have already seen, some time ago I already made a large multifunctional belt grinder, but for more precise processing I needed a Small Wheel attachment belt grinder.

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 ...