L
Laminar particles
Particles generated in rolling element bearings, which have been flattened out by a rolling contact.
Lead naphthenate
A lead soap of naphthenic acids, the latter occurring naturally in petroleum.
Light obscuration
The degree of light blockage as reflected in the transmitted light impinging on the photodiode.
Liquid
Any substance that flows readily or changes in response to the smallest influence. More generally, any substance in which the force required to produce a deformation depends on the rate of deformation rather than on the magnitude of the deformation.
Load-carrying capacity
Property of a lubricant to form a film on the lubricated surface, which resists rupture under given load conditions. Expressed as maximum load the lubricated system can support without failure or excessive wear.
Lubricant
Any substance interposed between two surfaces in relative motion for the purpose of reducing the friction and/or the wear between them.
Lubricant
Ability of an oil or grease to lubricate; also called film strength.