Cone penetration of greases

Investigating sulfate ash is a process used to identify inorganic levels in organic samples. Industry Bearing Solutions Application Solutions. The cone is placed so that its tip just touches the grease surface and the dial indicator is set to zero at this position. If the grease cannot withstand water, it may become soft or watery, and the quality will decrease. This makes the rheology measurement an ideal test for small amounts of used grease. This page was last edited on 12 October , at They do not melt like butter or coconut oil when warmed but hardly change at all as the temperature rises because the thickener holds the base oil firm.
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Problems with Cone Penetration

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Testing times for greases

Grease is formulated with up to 95 percent base oil. These greases were manufactured as equivalents and compared well through several tests. By measuring the onset of the reaction in the used grease commonly called the induction point in reference to the new grease, an estimate of the oxidation stability of the grease can be made Figure 3. Thus a worked penetration level is considered as significant as the unworked penetration level in regards to the service behavior of the grease. Typically they will have an unworked penetration level of about and a worked level of or higher. Current Issue Archive Advertise.
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Mechanical Duniya: Cone penetration test on Lubricating Grease - Grease Penetrometer

The magnitude of the G stresses measured for each grease was so different that an argument could be made that the greases were not the same and might be best suited for different applications. The intent is to test the grease samples with a similar level of pre-conditioning for a more consistent result. For example, a grease defined as NLGI 2 can be manufactured at either end of the scale. Take the smart route to manage medical device compliance. Examples include enclosed gear drives operating at low speeds and open gearing. Percent Change For some tests, such as oil versus gelling agent, it is more appropriate to set values on a percentage change rather than standard deviation. Please include product name, order quantity, usage, special requests if any in your inquiry.
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Chemistry and Technology Chemical Industries. The samples from the kettle and contactor were tested for yield stress, cone penetration and frequency sweep. Analyzing Used Grease Samples Changes in Grease Consistency Grease is made up of base oil, a gelling agent or soap thickener sometimes called filler and additives, which perform in much the same way as oil additives. It is also more likely to be invalidated by other variables such as inconsistent sampling techniques. Although it is easier to seal lubrication points with grease than with oil, grease should be resistant to water.
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