Refinishing Brake Rotors

Rotor Mounting Adapter:

REMOVE OR DISCONNECT
1. Inspect all mounting hardware for rust, nicks, dirt, or abnormal wear. All components must be in good condition and clean for proper results.
2. Inspect rotor, measure lateral runout and thickness variation. The mounting surface of the rotor must be clean and free from rust and nicks.
3. Mount J 37160-A on a spindle arbor, use a suitable combination of spacers or collets to tighten J 37160-A to the arbor. When using lathes with a 7/8-inch spindle arbor use J 37160-50, with J 37160-A. J 37160-50 is not required with lathes using a 1-inch spindle arbor.
4. Mount the rotor onto J 37160-A. Mount the clamp plate using the enclosed bolts/screws to the rotor. The rotor can be installed and removed while J 37160-A is mounted on the machine spindle. Tighten Rotor mounting adapter nuts in a cross pattern to 34 Nm (25 ft. lbs.).
5. Install anti-chatter silencer onto rotor.
6. Set spindle speed to approximately 150 RPM (or mid-range).
7. While the machine is running, bring tool bit up and touch off. Stop machine and check witness mark. If it goes 3/4 of the way around, the rotor is mounted properly. Continue with normal methods to resurface the rotor.
8. If the witness mark does not go 3/4 of the way around, repeat steps 1 through 7.