| Business | Phone |
| American Gear & Supply Co Inc 5400 Cedar Crest St, Houston 77087 | (713) 643-4321 |
| C-B Gear & Machine Inc 4232 Mooney Rd, Houston 77093 | (281) 449-0777 |
| Gammon Gear Works 9229 E Avenue Q, Houston 77012 | (713) 921-2514 |
| Lufkin Industries Inc 450 Gears Rd, Houston 77067 | (281) 875-6500 |
| Kreiter Geartech 2530 Garrow St, Houston 77003 | (713) 237-9793 |