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Glossary of Terms

Home > Document Library > Glossary of Terms

Ablation

Abrasion

Absolute (Dynamic) Viscosity

Absorption

Accumulator

Accuracy

Acid

Acid digestion

Acid Treating

Acidity

Active metal

Additives

Adhesion

Adsorption

Aeration

Aerosol

Aftercooling

Agglomeration

Air entrainment

Alkali

Alloy steel

Ambient temperature

Anhydrous

Aniline point

Annealing

Anodizing

API base stock

API engine service categories

API gravity

Apparent viscosity

Aromatic

Ash

Asperities

Auto-ignition point

Babbitt

Bactericide

Bactericide

Base

Base stock

Batch

Bearing

Beta Rating

Beta ratio (ß-ratio)

Black oils

Blend(ing)

Bloom

Blow-by

Boiling point

Bottoms

Boundary lubrication

Brinelling

Brookfield viscosity

BS&W (bottom sediment and water)

BTU

Bubble point

Burst pressure rating

Bushing

Bypass filtration

Bypass valve

Calibration / standardization

Cam

Capacity

Capillarity

Capillary viscometer

Carbon

Carbon residue

Case drain filter

Catalyst

Catalytic converter

Catastrophic failure

Cavitation

Cavitation damage

Cellulose media

Centipoise (cP)

Centistoke (cSt)

Centralized lubrication

Centrifugal separator

Certificate of analysis

Cetane improver

Cetane index

Cetane number (calculated)

Channeling

Chip detector

Chromatography

Circulating lubrication

Clean room

Cleanable filter

Cloud point

Coalescer

Coefficient of friction

Cohesion

Cold cranking simulator (CCS)

Collapse

Collapse pressure

Colloid

Complex grease

Compound

Compounding

Compressibility

Compression

Compression ratio

Consistency

Contaminant

Contaminant capacity

Contaminant failure

Contaminant lock

Contamination control

Coolant

Coolant

Copper strip corrosion

Correlation

Corrosion

Coupling

Cracking

Crown

Cryogenics

Cutting fluid

Cycle

Cyclic stress

Cylinder

Deaerator

Defect

Degas

Degradation

Dehydrator

Delamination

Demulsibility

Density

Deposit

Depth filter

Desorption

Detection limit

Detergent

Dielectric Strength

Dieseling

Differential pressure indicator

Disposable

Dissolved gases

Distillation

Dry-film lubricant

Duplex filter

Effluent

Elastohydrodynamic lubrication

Electrostatic separator

Emulsibility

Emulsion

Environmental contaminant

Erosion

Failure

Fatigue

Fault

Ferrography

Film strength

Filter

Filter efficiency

Filter element

Filter head

Filter housing

Filter life test

Filter media, depth

Filter media, surface

Filtration

Fire point

Fire-resistant fluid

Flash point

Flaw

Flow fatigue rating

Flow rate

Flow, laminar

Flow, turbulent

Flowmeter

Fluid

Fluid compatibility

Fluid power

Flushing

Foam

Force feed lubrication

Fourier Transform

Fretting corrosion

Friction

Full fluid-film lubrication

Full-flow filtration

Gasohol

Gauge

Gear

Gear train

Generated contaminant

Graphite

Gravimetric analysis analysis

Grease

Hardness

Heat exchanger

Housing

Hydraulic Fluid

Hydraulics

Hydrocarbon

Hydrodynamic lubrication

Hydrofinishing

Hydrolysis

Hydrolytic stability

Hydrometer

Hydrostatic lubrication

Hypoid gear lubricant

Idler

Immiscible

In-line filter

Indicator

Indicator, differential pressure

Influent

Infrared spectra

Ingested contaminants

Inhibitor

Insolubles

Interfacial tension (IFT)

ISO Solid Contaminant Code

ISO viscosity grade

Kinematic viscosity

Lacquer

Laminar particle

Liquid

Load-carrying capacity

Lubricant

Lubricity

Magnetic filter

Magnetic plug

Maintenance

Manifold

Manifold filter

Matrix

Matrix matching

Media

Media migration

Medium

Micron, micrometer (µm)

Middle distillate

MIL-Spec

Mineral oil

Miscible

Motor

Multigrade oil

Multigrade oil

Multipass or recirculation test

Naphthenic

Napthene

Neutralization number

Newtonian fluid

Nitration

NLGI number

Noble metal

Nominal filtration rating

Non-Newtonian fluid

Octane number

Oil analysis

Oil drain interval

Oiliness

Oxidation

Oxidation stability

Pale oil

Paraffinic

Particle

Particle count

Patch test

Penetration

Permeability

pH

Pinion

Platelet

Pleated filter

Pneumatics

Poise (absolute viscosity)

Polar compound

Polishing (bore)

Polymerization

Pore

Pore size distribution

Porosity

Positive crankcase ventilation (PCV)

Power unit

Pressure

Pressure drop

Pressure line filter

Pressure, absolute

Pressure, atmospheric

Pressure, back

Pressure, cracking

Pressure, rated

Pressure, system

Process contamination

Process oil

Pump

Pump, fixed displacement

Pump, variable displacement

Pumpability

Rate of shear

Reducer

Refraction

Rerefining

Reservoir

Reservoir (sump) filter

Residual dirt capacity

Return line

Return Line Filtration

Ring lubrication

Ring sticking

Rings

Roll-off cleanliness

Roller bearing

Rust

Rust prevention test

SAE viscosity numbe

Saturation level

Saybolt Universal Viscosity (SUV) or Saybolt Universal Seconds, (SUS)

Scuffing

Semisoli

Shear rate

Shear stress

Silt

Silting

Single-pass test

Sintered medium

Sleeve bearing

Sludge

Soap

Solid

Solvency

Spall

Specific gravity

Spectrometry

Spin-on filter

Spindle oil

Splash lubrication

Stainless steel

Starting fluid (diesel)

Static friction

Statistical process control

Statistical quality control

Stoke (St)

Strainer

Stringer

Suction filter

Sulfated ash

Sulfurized oil

Surface filtration

Surface tension

Surfactant

Surge

Swarf

Switch, pressure

Synthetic lubricant

Synthetic oil

Tensile strength

Thermal conductivity

Thermal stability

Thermography

Thin film lubrication

Thixotropy

Traceability

Tribology

Turbidity

Turbulent flow sampler

Unloading

Vacuum separator

Valve

Valve lifter

Valve, by-pass

Valve, directional contro

Valve, directional control, servo

Valve, flow contro

Valve, pressure control, relief

Valve, relief, differential pressure

Vapor pressure

Vapor Pressure (Reid method or RVP)

Varnish

Viscometer or Viscosimeter

Viscosity

Viscosity grade

Viscosity index (VI)

Viscosity, absolute

Viscosity, kinematic

Viscosity, SUS

Viscous

Volatility

Wear

Wicking

Worked penetration

ZDDP

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