Tribology overview

Tribology is the science and technology of interactive surfaces in relative motion.  An overview of the field of tribology can be found here.

Tribology incorporates various scientific and technological disciplines such as surface chemistry, fluid mechanics, materials, lubricants, contact mechanics, bearings, and lubrication systems. It is customarily divided into three branches: friction, lubrication, and wear. 


Gear and ball bearings

What is Tribology

Tribology is the science and engineering of surfaces in relative motion. It includes the study and application of the principles of friction, lubrication and wear.

green symbol and gear

Green Tribology

Green Tribology is a relatively new concept which can be defined as “the science and technology of the tribological aspects of ecological balance and of environmental and biological impacts.” This term has been credited to Professor Si Wei Zhang of China who introduced the term as a Tribology policy in the summer of 2009.

gold bearing


Bearings are devices which reduce friction by allowing controlled relative motion between two parts.

coating rip in metal


Coatings can be explained as a covering or a film which is applied to the surface of an object, in order to improve its surface properties such as appearance, adhesion, wettability, corrosion resistance, wear resistance and scratch resistance. Coatings may be applied as liquids, gases or solids.

drill bit


Friction can be explained as a force which occurs from the resisting of relative motion from solid surfaces, fluid layers, or material elements sliding against each other. Without friction we could not drive a car, walk, write or play violin, or even light a match!

Oil pouring over gears


Lubrication is the technique by which the friction and wear of closely spaced moving surfaces is reduced. In general, this is done by introducing a lubricant, which is often a liquid (but can also be a gas, or a solid).