- Couplings, shaft: rigid, flexible, universal joint, etc. (4)
- Drives, chains, and sprockets (2)
- Belting, chain (1)
- Chain, power transmission (2)
- Drives: belt, cable, or rope (3)
- Sprockets (power transmission equipment) (1)
- Clutches, except vehicular (1)
- Pulleys, power transmission (1)
