Shaft couplings for machines; Ball bearings for use in machines other than land vehicles; Belts for machines; Machine parts, namely, bearings; Pulleys being parts of machines; Roller bearings for machines; Roller chains being parts of machines; Driving chains other than for land vehicles; Transmission chains other than for land vehicles; Elevator chains being parts of machines; Gears, other than for land vehicles; Electric motors, not for land vehicles