Ford Corsar Repair Manual page 693

REAR DISC BRAKE (CLSH)
-
Rotor
Inspection
RUBBING SURFACE
Check rotor for roughness, cracks or chips.
RUNOUT
Make sure that axial end play is within the specifications before
measuring. Refer to section RA.
Then check runout with a dial indicator.
Rotor repair limit:
Maximum runout
(Total indicator reading at center of rotor pad
contact surface)
0.07 mm (0.0028 in)
THICKNESS
Rotor repair limit:
Minimum thickness
8.0 mm (0.315 in)