Tolerances of the braking surfaces for the following conditions are held closely during the manufacture of the brake rotor:

The maintenance of close tolerances on the shape of the braking surfaces is necessary in order to prevent brake roughness or pulsation. The surface finish must be held to a specified range of a 60 degree radius of roughness or less. A new rotor conforms to the above specifications, as will a correctly refinished rotor. For brake rotor refinishing, refer to Brake Rotor Refinishing . Control of the braking surface finish will eliminate the following problems:

Light scoring of the rotor surfaces not exceeding 1.5 mm (0.060 in) in depth is not detrimental to brake operation. Normal use may cause light scoring.