Rotor Refinishing

NOTE: Any servicing of the brake rotor requires extreme care to keep the rotor within service tolerances, thus ensuring proper brake action.

BRAKE ROTOR REFINISHING INFORMATION

Fig 6 Refacing Brake Disc:

Fig 7 Refacing Brake Disc -- Final Finish:

If the surface of the rotor is deeply scored, warped, or there is a complaint of brake roughness or pulsation, the rotor should be resurfaced or refaced.

Brake Rotor Refinishing Limits:

The Brake Rotor Refinishing Limit chart within the image shows the location of measurements and specifications when servicing the rotor.

Minimum Brake Rotor Thickness Markings:

The front and rear rotors used on this vehicle have markings for the minimum allowable thickness cast on an un-machined surface of the rotor.

Minimum allowable thickness is the minimum thickness which the brake rotor machined surface may be cut to.

CAUTION: Do not machine the rotor if it will cause the rotor to fall below minimum thickness when being properly machined.

The collets, shafts and adapters used on the brake lathe and the rotor MUST be clean and free from any chips or contamination.

When mounting the rotor on the brake lathe, strict attention to the brake lathe manufacturer's operating instructions is required.

If the rotor is not mounted properly, the lateral runout will be worse after refacing or resurfacing than before.

REFACING BRAKE ROTOR

NOTE: Refacing of the rotor is not required each time the brake pads are replaced.

When refacing a rotor the required 0.10 mm (0.004 inch) Total Indicator Reading (TIR) and 0.013 mm (0.0005 inch) thickness variation limits MUST BE MAINTAINED. Use extreme care and follow the lathe manufacturers directions closely.

The use of a double straddle cutter that machines both sides of the rotor at the same time is highly recommended.

RESURFACING BRAKE ROTOR
This operation can be used when a rotor's machined surface has rust, lining deposits, or excessive lateral runout or thickness variation.

A sanding rotor attachment will remove surface contamination without removing much rotor material.

It will generally follow variations in thickness that are in the rotor.