| Business | Phone |
| Bemcor Inc 940 E 150th St, Hammond 46327 | (219) 931-3000 |
| Diversified Machinery Inc 219 E Russell St, Hammond 46320 | (219) 937-1227 |
| Electro Tech Inc 5334 S Sohl Ave, Hammond 46320 | (219) 937-0826 |
| Faroc Inc 6015 S Hump Rd, Hammond 46320 | (219) 397-8978 |
| Hammond Machine Works Inc 5047 S Columbia Ave, Hammond 46327 | (219) 933-0479 |
| Industrial Tool & Mfg Co 4901 S Calumet Ave, Hammond 46327 | (219) 932-8670 |
| Millwright Machine Inc 8001 New Jersey Ave, Hammond 46323 | (219) 845-9200 |
| R & S Shop & Field Machining 237 Kenwood St, Hammond 46324 | (219) 931-5090 |
| Simko Machining Inc 4550 S Ash St, Hammond 46327 | (219) 932-1919 |
| State Industrial Machinery 924 E Willow Ct, Hammond 46320 | (219) 932-5311 |
| Trident Machine Technologies 2300 E Michigan St, Hammond 46320 | (219) 844-5700 |