Transformers
- ABB
- ACME
- Challenger
- Federal Pacific
- General Electric
- Hammond
- Hevi-Duty
- Magnetic Technologies
- MGM
- REX
- Sorgel/Square D
- Square D
- Tierney
- Westinghouse
Gear Reducers
- Bongshin
- Dodge
- DO James
- Falk
- Hansen
- Nuttall
- Overton Chicago
- Planet Gear
- Reliance
- Rexnord
- US Electric
- Westinghouse