- Bearings, bushings, and blocks (1)
- Bearings, plain (3)
- Railroad car journal bearings (3)
- Joints and couplings (1)
- Couplings, shaft: rigid, flexible, universal joint, etc. (3)
- Joints, swivel and universal, except aircraft and auto (2)
- Drives, chains, and sprockets (2)
- Belting, chain (1)
- Drives: belt, cable, or rope (1)
- Sprockets (power transmission equipment) (4)
- Clutches, except vehicular (3)
- Pulleys, power transmission (2)
- Shafts, flexible (2)
