Sub-categories: Power Transmission Parts
- Gearboxes (734)
- Gears (1265)
- - Bevel Gears (173)
- - Cylindrical Gears (40)
- - Other Gears (510)
- - Pinion Gears (65)
- - Rack Gears (38)
- - Ring Gears (90)
- - Spur Gears (243)
- - Worm Gears (106)
- Pulleys (787)
- Shaft Couplings (618)
- Speed Reducers (549)
- Sprockets (322)
- Transmission Belts (695)
- Transmission Chains (457)
- Universal Joints (183)
- Worms (91)