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MLT 1 MLA 1 Glossary Definitions.
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MLT 1 MLA 1 Glossary Definitions.
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MLT 1 MLA 1 Glossary DefinitionsTwo Body Abrasion - ANS-A wear mechanism that occurs in sliding contacts where a
hard surface contacts a softer surface producing a cutting effect.
Three body Abrasion - ANS-A wear mechanism that occurs when hard particles
become trapped between
two surfaces in sliding contact producing a cutting effect.
Absolute viscosity - ANS-The property of a fluid characterized by resistance to flow and
defined as the ratio of shear stress to the rate of shear of a fluid element.
Acid Number - ANS-The property that describes the acidity of a lubricating oil,
expressed by the mg of KOH required to neutralize the acid in one gram of sample.
Increasing acid number is often an indication of oxidation.
Additive - ANS-A substance added to lubricating oil to either improve desirable
properties, suppress undesirable properties or impart new properties to the lubricant.
Adhesive Wear - ANS-A wear mechanism that occurs under boundary lubrication
conditions when surfaces of similar metallurgy contact under high pressure causing
them to weld or adhere to one another.
AGMA - ANS-American Gear manufacturers association
Air Entrainment - ANS-Micro air bubbles suspended in oil.
Air Release Test - ANS-A test that indicates a lubricating oil's ability to release entrained
air. Air is diffused into the oil sample for a given duration, then, the amount of time
required for the entrained air to fall to 0.2% is recorded.
Aniline Point - ANS-The lowest temperature at which oil is completely miscible with an
equal volume of analine. The test is used to express the solubility of the oil.
Anti-friction Bearing - ANS-A rolling element bearing. (ball bearings, cylindrical roller,
spherical roller, etc.)
Antioxidant - ANS-An additive which inhibits oxidation of the lubricating oil.
, Anti-wear Additive - ANS-Additives that adhere to machine surfaces, creating a friction
and wear reducing film.
API Base Oil Groups - ANS-A system of classification that categorizes all base oil types
into one of 5 categories.
API Service Category - ANS-A system of classification that identifies the performance
and specifications required for engine oil.
Ash Content - ANS-The amount of incombustible material in a lubricating oil.
ASTM - ANS-American Society for Testing Materials
ATF - ANS-Automatic transmission fluid
Balanced Charge Agglomeration - ANS-A type of separation device that subjects oil to
an electric charge causing insoluble material to agglomerate so that it can be filtered
from the oil.
Base Number - ANS-Indicates the reserve alkalinity of an engine oil which
is its ability to neutralize acidic, combustion by-products. The value is expressed in mg
KOH / gm of sample.
Base Oil/Base stock - ANS-The primary component of a lubricant
Beta Rating - ANS-Indicates the performance of a filter at a given particle size. The Beta
rating is the ratio of particles (of a given size) upstream of the filter to the number of
particles downstream, or those that escape.
Bleed - ANS-Refers to separation of the base oil and thickener is a lubricating grease.
Blotter Spot Test - ANS-A useful field test that uses a special type of paper to which a
drop of oil is applied. The test can be useful for identifying certain contaminants,
dispersancy and oxidation.
Boundary Friction - ANS-The force that resists relative motion between two objects
whose opposing surfaces are wetted by a lubricant but just barely separated.
Boundary Lubrication - ANS-A condition that occurs in sliding contacts when the
lubricant film thickness is not sufficient to fully separate the interacting surfaces
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