Parallelism

Parallelism is the measurement of thickness of the rotor at four or more points around the circumference of the rotor. All measurement must be made at 22 mm (0.87 inch) from the edge of the rotor.





The rotor thickness must not vary more than 0.010 mm (0.0004 inch) from point to point.
Maximum parallelism: 0.010 mm (0.0004 inch)