Abstract: A method for surface-, plane-parallel-, and external plain lapping of starting work pieces with a lapping abrasive which is fed on a circularly shaped lapping abrasive track in determined quantity to the starting work pieces, and by which the starting work pieces are machine formed into face, plane-parallel or round finished work pieces. The lapping abrasive is fed to the starting work pieces on at least one additional circularly shaped lapping abrasive track or channel arranged concentrically to the first circularly shaped lapping abrasive track and having a different diameter, and in a differently dosed quantity relative to the first lapping abrasive quantity and separate from it.

Abstract: A two wheel-lapping machine for surface-, plane-parallel-, and external plain or cylindrical- lapping, with two lapping- or working- wheels, which are mounted on one lapping wheel carrier, respectively, of which the upper lapping wheel carrier is mounted on the lower end of a main spindle and the lower lapping wheel carrier is mounted on the upper end of a main shaft, the latter being rotatably supportd in the machine bed; wherein the main spindle is formed as a piston and is axially displaceable with the piston in a cylinder, with the cylinder being rotatable in a slide, and with the slide being horizontally displaceably mounted in a frame or portal, the latter being rigidly arranged at a distance above the machine bed by means of several portal supports.

Abstract: A machine for surface-, plane-parallel-, and external plain lapping of starting work pieces with a lapping abrasive which is fed on a circularly shaped lapping abrasive track in determined quantity to the starting work pieces, and by which the starting work pieces are machine formed into face, plane-parallel or round finished work pieces. The lapping abrasive is fed to the starting work pieces on at least one additional circularly shaped lapping abrasive track or channel arranged concentrically to the first circularly shaped lapping abrasive track and having a different diameter, and in a differently dosed quantity relative to the first lapping abrasive quantity and separate from it.