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Grease worked penetration

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Grease penetration tests are conducted by Nye technicians in order to determine the stiffness of a grease. They are two of the four required tests performed on every single batch of grease at Nye prior to shipping. The penetration test begins with the grease at 25 degrees Celsius, plus or minus 1 degree Celsius, being levelled into a cup. Using a penetrometer, a cone is dropped into the cup for 5 seconds, creating a hole in the grease. The technician records the depth in a tenth of a millimeter of this hole. This value is known as the P0 or unworked penetration.
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Stanomatic Dual Grease Worker | ASTM D | IP 50

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Penetration number

The American Society for Testing and Materials ASTM defines lubricating grease as: "A solid to semifluid product of dispersion of a thickening agent in liquid lubricant. As this definition indicates, there are three components that form lubricating grease. These components are oil, thickener and additives. The base oil and additive package are the major components in grease formulations, and as such, exert considerable influence on the behavior of the grease. The thickener is often referred to as a sponge that holds the lubricant base oil plus additives. Most greases produced today use mineral oil as their fluid components. These mineral oil-based greases typically provide satisfactory performance in most industrial applications.
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Need to Know: Grease Consistency

This short article focuses on basic grease lubrication in roller bearings. The influences that affect the performance of grease lubrication is very complex and would require a much more in-depth article than this piece is intended to provide. These influences go beyond just grease formulation and are associated with factors such as bearing designs, load, vibration and oscillation, operating temperatures and service environment. Greases are typically applied in areas where a continuous supply of oil cannot be retained.
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The data provided is based on standard laboratory tests and given only as a reference. The indicators can vary within the permissible range. We use cookies. If you continue to use the site without changing your settings, we'll assume that you are happy to accept all cookies on our website. Remember you can change your settings at any time by referring to the help menu on your internet browser.
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