Bearing cages being parts of machines; Bearing housings for machines; Bearing inserts for machines; Bearings for transmission shafts, being parts of machines; Bearings, as parts of machines; Bushings for use as parts of machines; Conveyers being machines; Conveyor lines; Conveyors being machines; Elevators and parts of elevators; Elevators and parts thereof; Idling pulleys being parts of machines; Pulleys being parts of machines; Anti-friction bearings for machines; Assembly line conveyor machinery; Belt conveyors; Bushing assembly for conveyor pulleys; Chain conveyors; Hydraulic conveyors; Machine parts, namely, bearing housings; Machine parts, namely, bearing inserts; Machine parts, namely, bearings; Machine parts, namely, bearings and bushings; Machine parts, namely, mechanical seals; Metal pulleys being parts of machines; Oil seals being machine parts for conveyors; Oil seals being machine parts for mining machines; Oil seals being machine parts for agriculture machines; Oil seals being machine parts for food processing machines; Oil seals being machine parts for rock crusher machines; Oil seals being machine parts for packaging machines; Oil seals being machine parts for spacecrafts; Pneumatic conveyors; Roller conveyors; Screw conveyors; 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 bearing machines, conveyors, handling trucks and machines, lifting machines, agricultural machinery, construction equipment machines and hydraulic turbines; Sliding bearings for machines; Winding machines, packaging machines, conveying machines, particularly conveyor belts, roller conveyors and carrier rollers for web materials