| Center for Tribology - CET | | Center For Tribology, Inc. is a tribology testing laboratory and a provider of tribology test instrumentation. |
| Ducom | | Manufacturer of standard and custom designed material testing equipment. Includes sample product list. |
| Falex Corporation | | Offers a complete line of tribology test equipment and services for friction, wear, lubrication, and abrasion studies. |
| Falex Tribology NV | | A tribological testing laboratory and manufacturer of tribological test machines and specimens for sale |
| Koehler Instrument Co., Inc. | | Designs and manufactures tribology instruments for friction and wear testing conforming to ASTM, IP and related test methods as well as custom designed products. |
| National Tribology Services, | | Offers testing of gearboxes, pumps, compressors, engines, turbines, hydraulics, greases, and used lubricants, oil analysis laboratory |
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