40 Treatment of materials, namely grinding, brushing, polishing, blast treatment and superfinishing of roller bearing parts, rollers, camshafts, crank shafts and workpieces of metal, plastic, ceramic or glass in the nature of rollers, camshafts, crankshafts, gear shafts, cylindrical clamped spherical rollers, tapered rollers, discs, balls, calottes, balancing shafts, cams, pump cams, eccentric rollers, pump cam shafts, steering rods, steering racks, absorber rods, shock absorber, drive shafts, piston pins and cam rollers, synchronous wheels, pump gear wheels, injection bodies, valve plates, pump bodies, cylinder roller bearings, tapered roller bearings, ball joint bearings, special bearings, shafts and bushings; machining services of surfaces, namely, the polishing of metal during the manufacturing process; contract manufacturing, for others, of workpieces of metal, in particular roller bearing parts, camshafts, crank shafts; custom manufacture of molded components, in particular rollers, camshafts, crankshafts, gear shafts, cylindrical clamped spherical rollers, tapered rollers, discs, balls, calottes, balancing shafts, cams, pump cams, eccentric rollers, pump cam shafts, steering rods, steering racks, absorber rods, shock absorber, drive shafts, piston pins and cam rollers, synchronous wheels, pump gear wheels, injection bodies, valve plates, pump bodies, cylinder roller bearings, tapered roller bearings, ball joint bearings, special bearings, shafts and bushings