bob vaughan· Registered
These two portable belt sanders show how the ring goes around the brush holder. The trick is to get another ring and solder it in place. The ring is generally an integral part of the field coil windings but it can be replaced by splicing. I've done it on portable power tools that were worth rebuilding if that's all that's wrong. Sometimes the brush holder component gets loose and twists. This leads to a lot of sparking and eventually burns through the circular ring.