A lubricant composed of an oil or oils thickened with a soap, soaps or other thickener to a semisolid or solid consistency.


The rheological properties of a grease are commonly measured by penetration and apparent viscosity.

Work Penetration

The penetration of a sample of lubricating grease immediately after it has been brought to 77°F and then subjected to 60 stokes in a standard grease worker. ASTM Method D 217.

See also: Bearing, Black Oils, Degrease, Fibre Grease, Grease Gun, Lubricant, Lubricating Grease, Oil.

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Subjects: Mechanical Engineering