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History 1
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History 3
History 4
History 5
History 6
History 7
History 8
History 9

Lubrication 1
Lubrication 2
Lubrication 3 - Oil
Lubrication 4 - Engine Oil
Lubrication 5 - Additives
Lubrication 6 - Oil Filter 1
Lubrication 7 - Oil Filter 2
Lubrication 8 - Oil Change?
Lubrication 9 - Centrifuge
Lubrication 10 - Oil Level
Lubrication 11 - Press. Circulation
Lubrication 12 - Dry Sump
Lubrication 13 - Oil Pump
Lubrication 14 - Gear Pump
Lubrication 15 - Crescent Pump
Lubrication 16 - Rotor Pump
Lubrication 17 - Ventilation
Lubrication 18 - Oil Sump
Lubrication 19 - Oil Separation
Lubrication 20 - Viscosity
Lubrication 21 - Oil Cooling
Lubrication 22 - Heat Exchanger
Lubrication 23 - Gearbox Oil
Lubrication 24 - Gearbox
Lubrication 25 - Shaft Sealing Ring
Lubrication 26 - Seal - Gasket
Lubrication 27 - Circulation
Lubrication 28 - Grease

Lubrication 1
Lubrication 2
Lubrication 3
Lubrication 4
Lubrication 5
Lubrication 6
Lubrication 7
Lubrication 8
Lubrication 9
Lubrication 10
Lubrication 11
Lubrication 12
Lubrication 13
Lubrication 14
Lubrication 15



Lubrication 28 - Grease



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Assignment

Grease should be water-repellent and anti-oxidant, allowing little friction when cold. It should withstand high pressures and aggressive chemicals, prevent corrosion and maintain all these attributes for a long time. Some of these demands exclude each other, e.g., the low frictional properties and the longevity.

Function

Grease is formed, when lyes, like potash lye or calcium hydroxide, react with fatty acids, creating soaps. Mixing it with mineral oil, heating it up and cooling it down in a certain manner, creates grease. Basically, what we are left with, is thickened lubrication oil. An important measure of it's consistency, is it's ability to penetrate. Grease is widely used, for roller bearings (e.g., wheel bearings) and even for the lubrication of rails. If it is not possible to use oil for sliding bearings, grease is an alternative. If the grease is to be used under special conditions like high temperatures, solid lubricants like graphite or molybdenum sulphide may be added.


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