Grease penetration class

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Copper corrosion Lubricating greases should protect copper alloys used in bearings from corrosive attack while in service. Oil separation Oil separation test. The viscosity is stated based on this mixture. A penetration of would represent a solid grease while a penetration of would be semifluid. The wear on each bearing is then measured. Complex greases are made by combining the conventional metallic soap with a complexing agent. As a guideline, the base oil's pour point is considered the low-temperature limit of a grease.

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Grease is spread into a small pot.

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NLGI consistency number

Examples include enclosed gear drives operating at low speeds and open gearing. Greases with a higher number are firmer, tend to stay in place and are a good choice when leakage is a concern. These soaps include lithium, aluminum, clay, sodium and calcium. Views Read Edit View history. To establish the dropping point, a grease sample is warmed in the testing device until liquid drops fall to the bottom of the test tube through an opening in a nipple. I would like to know

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