7 Machine parts, namely, bearings, namely, roller bearings, spherical plain bearings, ball bearings, anti-friction bearings, engine bearings, high performance bearings, precision bearings, machine tool bearings, integrated bearings, and aerospace bearings; integrated bearing assemblies being machine parts; bearings being machine parts and parts thereof, namely, cups, cones, rollers, balls, spacers, retainers, cages and shields; machine parts, namely, bearing housings, covers and closures; seals and seal wear rings for bearings being machine parts; machine parts, namely, journal boxes, journal box covers, closures and spacers; closures for lubricant flingers being machine parts; brakes for machines and brake systems for machines; worms being gear parts for machines and gears for machines; engine transmissions for machines; grinders; axles for machines; machine parts, namely, wheels and pulleys; machine parts, namely, lubricators for roller bearings, chains, linear guideways, gears, seals and machines; precision bearing inserts being machine parts and mechanical seals used in industrial and automotive applications to assist in the sliding, rolling and lifting motion of machinery, all being parts of machines; aircraft and boat parts, namely, engine bearings and engine bearing parts, namely, cups, cones, rollers, balls, spacers, retainers, cages and shields; rotor hubs being machine parts; gas turbine engines not for land vehicles; machine parts, namely, transmissions, turbine blades, compressor wheels, compressor blades, gears, combustors and yokes; aviation drive train components, namely, main rotor hubs, transmissions, gearboxes, tail rotor gearboxes, main rotor masts and servos