Brake Rotor Tolerance

In the manufacturing process of the brake rotor:
- Tolerances of the braking surfaces are checked for flatness.
- Thickness variation is observed.
- Lateral runout is closely maintained The maintenance of close tolerances on the shape of the braking surfaces is necessary to prevent brake roughness or pulsation.
- In addition to these tolerances the surface finish must be maintained to a specified texture. The control of the braking surface finish is necessary to avoid the following braking concerns:
- Hard pedal-apply.
- Excessive brake fade.
- Pulls.
- Erratic performance.
- Extending lining life.
- Light scoring of the rotor surfaces not exceeding 1.5 mm (0.060 inch) in depth is not detrimental to brake operation and may result from normal use.