Abstract: Improvements in a rotor runout and concentricity jig that mimics the runout and/or concentricity of an axle of a vehicle that can be transferred to a rotor. The jig uses discs with high and low points and/or two eccentric tubes. The parts can be adjusted from in-phase to out of phase to duplicate the characteristics of the axle. The adjustments have incremental detents that correspond with the imperfections of the axle to rotor. The position of the rotor is marked on the axle and the rotor to ensure that the rotor is placed onto the axle in the exact same location. The axle and the rotor are cleaned, reinstalled and measured for runout and concentricity. The rotor is then removed and inaccuracies for runout and/or concentricity are transferred to the jig for machining the rotor.

Abstract: Improvements in a rotor runout and concentricity jig that mimics the runout and/or concentricity of an axle of a vehicle that can be transferred to a rotor. The jig uses discs with high and low points and/or two eccentric tubes. The parts can be adjusted from in-phase to out of phase to duplicate the characteristics of the axle. The adjustments have incremental detents that correspond with the imperfections of the axle to rotor. The position of the rotor is marked on the axle and the rotor to ensure that the rotor is placed onto the axle in the exact same location. The axle and the rotor are cleaned, reinstalled and measured for runout and concentricity. The rotor is then removed and inaccuracies for runout and/or concentricity are transferred to the jig for machining the rotor.

Abstract: A brake rotor refinishing system provides simultaneously refinishing of two workpieces that are clamped at opposite ends of a duplex chuck, when the chuck is installed on a machine spindel. The duplex chuck has respectives sets of jaws that are independently driven by separate pinion elements. In the case of disk brake rotors, opposite sides of both workpieces are finished simultaneously. The system also includes a refinishing machine that incorporates the spindle and a machining mechanism having cutting elements for simultaneously refinishing opposite sides of a pair of disk rotors.

Abstract: A brake rotor refinishing system provides simultaneously refinishing of two workpieces that are clamped at opposite ends of a duplex chuck, when the chuck is installed on a machine spindel. The duplex chuck has respectives sets of jaws that are independently driven by separate pinion elements. In the case of disk brake rotors, opposite pinion both workpieces are finished simultaneously. The system also includes a refinishing machine that incorporates the spindle and a machining mechanism having cutting elements for simultaneously refinishing opposite sides of a repair of disk rotors.

Abstract: An adaptor for refinishing brake disk rotors includes a first flange member having a flange bore for closely fitting a rotatably mounted machine spindle member. The first flange member has an annular flange surface perpendicular to the flange bore for axial registration of the disk rotor, and a cavity for receiving a portion of the disk rotor. In one configuration, the adaptor includes a disk member having an accurately formed disk bore for closely fitting the spindle member, and an external shoulder for radial registration of a centering diameter of the rotor; and a second flange member for clamping the mounting flange against the flange surface by a clamping nut of the spindle member, whereby the disk rotor rotates rigidly with the spindle member. In another configuration, the first flange member has a set of movable jaws for radially clamping against the centering diameter.