Establishments primarily engaged in manufacturing mechanical power transmission equipment and parts, for industrial machinery. Establishments primarily engaged in manufacturing motor vehicle power transmission equipment are classified in Industry 3714; those manufacturing aircraft power transmission equipment are classified in Industry 3728; those manufacturing ball and roller bearings are classified in Industry 3562; and those manufacturing speed changers, industrial high-speed drives, and gears are classified in Industry 3566.
- Ball joints, except motor vehicle and aircraft
- Bearings, plain
- Belting, chain
- Chain, power transmission
- Clutches, except motor vehicle
- Collars, shaft (power transmission equipment)
- Couplings, shaft rigid, flexible, universal joint, etc.
- Drive chains, bicycle and motorcycle
- Joints, swivel: except motor vehicle and aircraft
- Joints, universal: except motor vehicle
- Pillow blocks, with plain bearings
- Pivots, power transmission
- Pulleys, power transmission
- Railroad car journal bearings, plain
- Shafts, flexible
- Sprockets (power transmission equipment)