Commutator Resurfacer,5/8 x 3/8 x 6 In
FINE - MEDIUM OR COURSE -YOU PICK WHICH ONES YOU NEED
THESE ARE HARD STONES AND WILL NOT WEAR OUT AFTER A FEW MINUTES AS OTHER AND CHEAPER COMMUTATOR STONES DO. THESE WILL LAST A LONG TIME
New brushes must be beveled and concaved to conform as closely as practical to the curvature of the communicator (DC) or slip-ring (AC).
The seating stone is a none conductive stone (NEVER USE EMERY OR ANY SYNTHETIC OXIDE TO SEAT BRUSHES!) that is pressed lightly on the communicator near the leading edge of the brush.
Commutator Resurfacer, Pencil Type, Finish Grade, For Use With Fan or Signal Motors, Automotive Generators, Welding Machine armatures , slip rings and commutators . Locomotive Headlight Motors and Fractional HP Motors, Length x Width x Depth 5/8 x 3/8 x 6 In
Use the course for removing pitts , gouges and burnt spots . Use Medium to reseat new brushes . Use Fine to touch up after using medium or to remove oxidation and black marks once every 50 hours.