These sites are from companies that make, manufacture, distribute or sale primarily lab instruments for tribology or the study of lubrication or its effects.
Tribology: The science of the mechanisms of friction, lubrication, and wear of interacting surfaces that are in relative motion. From the Greek tribos, a rubbing; tribein, to rub.
Designs and manufactures tribology instruments for friction and wear testing conforming to ASTM, IP and related test methods as well as custom designed products. www.koehlerinstrument.com