Initial Inspection and Diagnostic Overview

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
- Premature lining wear

^ 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.