- 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
- Imperial Scientific Industries - Imperial offers tribology and petroleum test equipment as per ASTM, IP, DIN and other international standards.
- 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
- Paragon Scientific - Viscosity standards and refractive index standards.
- Plint and Partners Ltd - Tribology testing division.
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