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11-11-2016, 11:59 AM
Post: #1
The Basics of Lubricants and lubrication


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Friction - is created when there is relative motion between two surfaces
Resistance to motion is defined as friction
Lubrication is use of a material between surfaces to reduce friction
Any material used is called a lubricant




Methods of lubrication

Two main methods
Hydrodynamic lubrication
Boundary lubrication

Hydrodynamic lubrication
Also called complete or full flow
Occurs when two surfaces are completed separated by a fluid film




Two main methods
Hydrodynamic lubrication
Boundary lubrication

Boundary lubrication
Occurs when Hydrodynamic lubrication fails.
By adsorption or chemical reaction



Types of Lubricant - Physical

Liquid
Solid
Semi solid
Gases



Liquid
Typical lubricants are liquid/fluids
Mineral oil or synthetic oils
Solid
Graphite, MoS2
Semi solid
Greases
Gases
Atomised 2 stroke oils



Engine oils
Gear Oils
Turbine Oils
Hydraulic Oils
Metal working oils
Cutting oils
Forming Oils
Rust preventives




Heat Transfer Oils
Heat Treatment Oils
Quenching Oils
Tempering Oils
Refrigeration Oils
Rubber Process Oils
Ink process Oils
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