- Bearings, bushings, and blocks (2)
- Bearings, plain (4)
- Joints and couplings (1)
- Couplings, shaft: rigid, flexible, universal joint, etc. (5)
- Joints, swivel and universal, except aircraft and auto (1)
- Drives, chains, and sprockets (1)
- Belting, chain (1)
- Chain, power transmission (1)
- Drive chains, bicycle or motorcycle (1)
- Sprockets (power transmission equipment) (1)
- Clutches, except vehicular (6)
- Pulleys, power transmission (4)
- Shafts, flexible (3)
