Adaptor piece used with the three jaw chuck system. Usually due to improper surface finish on rotor.
Carbide is used for inserts because it is very wear resistant.
Usually has a herringbone appearance. A high-pitch, chattering sound will be produced during cut. A mounting accessory that is used to clamp hubless drums and rotors. A centering cone must be used with clamp cups. A hubless rotor with a stamped steel center section.