Quote:
Originally Posted by aerobod
You need to rotate the rotor with the wheel off, but lug bolts in place with either a spacer or nut and washer under each bolt so they can be torqued to spec, then use a dial guage to measure the runout at the edge, middle and inner part of the brake surface. If the runout is more than 0.05mm over a full rotation, then the rotors are likely warped. Also, the thickness variation at a specific radial position should not vary by more than 0.01mm around the diameter, measured with a micrometer.
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Thanks for the procedure. I am curious. I had considered running them on a CMM but it would be hard to maintain torque on the rotor unless i built some sort of jig. A bit more detective work than I am willing.