ASTM D2596 PDF


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Seta-Shell Four Ball Autoload Lubricant Tester for ASTM D, ASTM D, IP We perform grease testing by ASTM D to measure the load-carrying properties or load wear index of lubricating grease using a four ball test apparatus. This standard is issued under the fixed designation D ; the number 1 This method is under the jurisdiction of ASTM Committee D02 on Petroleum.

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Three measurements go into determining the LWI. Results are reported as percent change expressed in whole numbers with a functional range from 0 to percent. The d256 of xstm grease to perform under extreme pressure conditions is determined by the load wear index LWI. In particular, the results of the load-carrying capability or four-ball d256 pressure testing illustrated the aspect of performance dilution upon contamination. A graphic representation showing the dramatic difference in load-carrying capability between two grease samples sample No.

Testing Overview More often than not, intermixed grease analysis shows minimal changes in grease performance, but this cannot be taken as the rule without proper assessment.

A Testing Example An overview of a recently performed aviation grease study by Anderol demonstrates the necessity of proper grease testing within the actual manufacturing environment. Mud, water and steam can wash away grease, leaving metal unprotected.

The higher the number, the greater the long-term protection. In the next issue, we will describe how wear scars from the various tribological tests are measured two dimensionally using optical microscopes and three dimensionally using profilometry. For this experiment, a low-level, 10 percent by weight, of contamination was d5296 to avoid harmful degradation of the individual greases astn to simulate a situation common to typical grease changeouts.

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The purpose of this testing is to determine the load carrying capabilities of a lubricating grease under high load applications.

Dropping point ASTM test: Generally, greases having similar thickener types will be compatible, but even greases of the same thickener systems can be deemed incompatible because of differing additive treatments and must be judged on an individual basis. The final determination of compatibility comes with proper testing of greases in the application for key performance properties.

Results are reported as pressure loss expressed in pounds per square inch psi with a functional range from 0 to psi. The result v2596 breakdown of grease, cold welding or galling. Simply, compatibility results when the performance properties of the mixed greases are equal or better than the lower performing grease. Determines resistance of a lubricating grease to washout by water Result values and what they mean: Welding can be detected if any of the following are noticed:.

The lower the percent change, the greater the mechanical stability of the grease. Acids, caustics and cleaning solutions can break grease down and corrode metal. The better the lubricant is at preventing wear, the smaller the wear scar will be on the three sstm balls.

Dust, fibers and abrasive particles can combine with grease and grind away metal. The Best Gets Better: Penetration ASTM test name: Although these results do not necessarily correlate with real life applications, the method has become an industry standard in comparing EP, wear and frictional functionality.

The higher the L-M score, the more applications the grease will provide lube protection. The coefficient of friction is also measured throughout the 60 minute test with the average being reported d256 the end of the test.

It was found that all three greases showed good mechanical shear stability, antiwear performance and extreme pressure characteristics consistent with the specifications to which each individual grease was designed.

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Maximizing Grease Performance Through Optimal Compatibility

Because percent grease replacement is unlikely, some level of contamination is certain to occur, requiring the pre-implementation measurement of leftover grease with a new product before finalizing an upgrade or machinery process change.

Results are reported in kilograms kg with a functional range from kg to kg. Innovative data and testing tools aid the decision process through the analysis of two or more co-mingled greases. Seven tests for selecting the right grease Greases are used to overcome real-world problems presented by operating environments and operating conditions of mechanical equipment. Force applied to a bearing or journal that exceeds the load carrying capability of the grease.

The answers are in a few ASTM test methods. Click Here to see Tables 1 and 2. The higher the number the greater load-carrying ability.

How do you know what grease will work best at protecting your equipment? Advantages of Using Polyurea Grease.

ASTM D2596 – 15

Relubricate frequently, taking care not to overlubricate, especially motors. Before implementing a new product, plant and maintenance engineers must weigh all consequences of grease intermixing and the impact on equipment reliability, production levels and the bottom line.

Imagine the test as a routine traffic light. Select greases with similar thickening systems. Even though the study found no grease incompatibility issues, changes in grease performance were measured and documented. Optimally, supplier testing will show low levels of contamination where performance is not affected, making the transition to a new grease product quick and easy.

Simply put, all the grease samples were found to be compatible with one another.