just a tip...............we all have angle grinders,drills sanders and the like.......
do not throw away old carbon brushes.
when a brush comes to the end of its life,a small ball throws out stopping contact with the rotor.
simply file the end flat,and cut a piece of old brush.insert into the carrier ontop of the old brush.
you can file it the same shape,but you dont have to be fussy....works perfect.

