I have an electric chop saw. The brush on one side of comutator has worn out. Manufacturer no longer has brushes available for this model ( naturally) So, I replaced the brush with one I shaved down. I purchased the replacement brush from a automotive Starter rebuild shop.
Saw worked fine for two weeks...there was much arcing when the motor ran from this brush. I would like to learn why?
Now the saw motor quit. ???
So I ask you, is there a difference in brush material for a DC starter and that used in a electric motor?
Also has any one a source for replacment brushes for AC motors 120 volt for a chop saw? The saw was built by Black and Decker, and is their professional line.
I await your replies.