Anti-friction bearings for machines; Ball transfer units; Bearing brackets for machines; Bearings for transmission shafts, being parts of machines; Lubricating pumps; Machine parts, namely, bearings; Machine parts, namely, roll mill bearings; Machine parts, namely, roller bearings; Self-lubricating mechanical friction parts, especially of composite materials, namely, wear rings, washers, bushings, spherical bearings, bearing pads, sliding blocks and machine transmission gears all for load bea...