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Industrial Lubricant Terms
–
Also referred to as "cutting wear." This occurs when hard surface
asperities or hard particles have embedded themselves into a soft surface.
– The force or forces
causing two materials, such as a lubricating grease and a metal, to stick
together.
– A refined mineral oil,
free of additives, used as a component in a lubricant blend.
– The separation of
oil from a grease structure. A certain amount of bleeding is considered
desirable in greases, since this tends to provide continuous oil lubrication
to bearings.
– A liquid in which
another immiscible liquid is suspended. Water and oil can be emulsified
under certain conditions of oil type and severe agitation. Emulsifying
agents are sometimes added to oils for production of cutting fluids, which
are to be mixed with water.
– In lubricating grease,
the form in which soap thickeners occur, the soaps crystallizing in threads,
which are of the order of 20 or more times as long as they are thick.
– A resistance to motion
between two surfaces in contact.
– The fluid entering
a component.
– A positive displacement
(oil or grease) lubricant measuring valve that dispenses lubricant when
main line pressure rises and resets when its compressed return spring
forces the measuring piston back to its rest position.
– Any substance used
to separate two surfaces in motion and reduce the friction or wear of
the surfaces.
– Liquids capable of
forming a liquid solution or uniform mixture between themselves, e.g.
gasoline and oil are miscible.
– Numbers
assigned by the NLGI to classify greases according to their hardness as
measured by a cone penetration test.
– An electrical or electronic
device that compares (monitors) a lubrication systems operation to a user
selected time frame, or delivery rate.
– A general term for a water-insoluble
thick liquid that possesses lubricating properties.
– Term applicable
to crude oil and the hydrocarbon products and materials that are derived
from it.
– The ability of
a lubricating grease to flow under pressure through the line, nozzle and
fitting of a grease dispensing system at varying temperatures.
– Loss of liquid lubricant
from a lubricating grease due to shrinkage or rearrangement of the structure.
– The measurement
of a fluid's resistance to flow. It is defined as the shear stress on
a fluid element divided by the rate of shear; “high viscosity”
applies to a fluid which does not flow easily, “low viscosity”
to a fluid, such as water, which flows easily.
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