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