| Business | Phone |
| Accu Drive Inc 610 W Pershing Rd, Chicago 60609 | (773) 376-4906 |
| Aircraft Gear Corp 6633 W 65th St, Chicago 60638 | (708) 594-2100 |
| Allied Gear Co 4901 W Arthington St, Chicago 60644 | (773) 287-8742 |
| Gear Products Co 4956 S Lawndale Ave, Chicago 60632 | (773) 735-4846 |
| Chicago Gear-Do James 2823 W Fulton St, Chicago 60612 | (773) 638-0508 |
| Hadley Gear Mfg Co 4444 W Roosevelt Rd, Chicago 60624 | (773) 722-1030 |