Sub-categories: Power Transmission Parts
- Gearboxes (605)
- Gears (1146)
- - Bevel Gears (136)
- - Cylindrical Gears (62)
- - Other Gears (397)
- - Pinion Gears (77)
- - Rack Gears (45)
- - Ring Gears (131)
- - Spur Gears (262)
- - Worm Gears (36)
- Pulleys (470)
- Shaft Couplings (439)
- Speed Reducers (506)
- Sprockets (279)
- Transmission Belts (453)
- Transmission Chains (308)
- Universal Joints (130)
- Worms (60)