- Bearings, bushings, and blocks (3)
- Bearings, plain (11)
- Couplings, shaft: rigid, flexible, universal joint, etc. (11)
- Joints, swivel and universal, except aircraft and auto (1)
- Belting, chain (3)
- Drives: belt, cable, or rope (4)
- Sprockets (power transmission equipment) (7)
- Clutches, except vehicular (10)
- Pulleys, power transmission (2)
- Shafts, flexible (3)
