Plint and Partners Ltd
- Tribology testing division.
- http://home.btconnect.com/PHOENIXTRIBOLOGY/

Ducom
- Manufacturer of standard and custom designed material testing equipment. Includes sample product list.
- http://www.ducom.com/

Falex Tribology NV
- A tribological testing laboratory and manufacturer of tribological test machines and specimens for sale
- http://www.falexint.com/

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.
- http://www.koehlerinstrument.com/

Imperial Scientific Industries
- Imperial offers tribology and petroleum test equipment as per ASTM, IP, DIN and other international standards.
- http://www.tribotesters.com/

Falex Corporation
- Offers a complete line of tribology test equipment and services for friction, wear, lubrication, and abrasion studies.
- http://www.falex.com/

Paragon Scientific
- Viscosity standards and refractive index standards.
- http://www.paragon-sci.com/

National Tribology Services,
- Offers testing of gearboxes, pumps, compressors, engines, turbines, hydraulics, greases, and used lubricants, oil analysis laboratory
- http://www.natrib.com/

Center for Tribology - CET
- Center For Tribology, Inc. is a tribology testing laboratory and a provider of tribology test instrumentation.
- http://www.cetr.com/