Retired Engineer, Hobby woodworker
I had a cordless circular saw and a palm sander that did the same thing. I started taking them apart and the balls from the shaft bearings came falling out. Threw them away.My Porter Cable 690 VLR variable speed router motor self-immolated several months ago, showering plastic pieces everywhere (I suspect the brushes self-destructed). Online searches reveal that replacement motors are nowhere to be found. Seems a shame to just toss the thing, because I have a complete kit - fixed and plunge bases, etc. Any advice out there?