Disc Brake Rotors
NOTE:
A hub mounted on-vehicle lathe is highly recommended. This type of lathe trues the rotor to the vehicles hub/bearing.
The disc brake rotor can be machined if scored or worn. The on-vehicle lathe must machine both sides of the rotor simultaneously with dual cutter heads. The rotor mounting surface must be clean before placing on the on-vehicle lathe. Equipment capable of machining only one side at a time may produce a tapered rotor This type of rotor machining is not recommended .
NOTE:
Proper wheel torque is also critical to help prevent any warping of the disc brake rotor.
CAUTION:
Brake rotors that do not meet minimum thickness specifications before or after machining must be replaced.