Off-Vehicle Refinishing

Lathe Manufacturer's Recommended Specifications And Procedure:

Refer to chart showing two recommended procedures that achieve adequate results using two different vendor's off-vehicle drum/disc brake lathes (If any other vendor's lathe is used, follow that vendor's recommended procedure). It is very important that the rotor surface be made non-directional by dressing the rotor surfaces with a sanding disc power tool such as Ammco 8350 Safe Swirl Disc Rotor Grinder, or equivalent, using 120 grit aluminum oxide sandpaper. Sand each rotor surface with moderate pressure for a minimum of 60 seconds. An alternate method is to use a sanding block with 150 grit aluminum oxide sandpaper. With the rotor turning approximately 150 RPM, sand each rotor finish for a minimum of 60 seconds using moderate pressure. After the rotor has been sanded, clean each surface with denatured alcohol or suitable brake cleaner. The finish rotor surface should be as close to that of a new rotor as possible. Failure to obtain the best possible rotor finish may affect initial braking performance.