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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Make sure to use a valid business email address. Determines resistance of a lubricating grease to washout by water Result values and what they mean: Based on this value, one can formulate greases with different levels of extreme pressure qstm.

Mud, water and steam can wash away grease, leaving metal unprotected. In this example, a recent three-test trial of intermixed lithium soap-thickened greases reveals details of compatibility when observing grease consistency, antiwear and extreme pressure along with water contamination on extreme pressure grease performance.

Figure 2 shows how the performance of a grease can be reduced by contamination from water or a lesser performing grease.

Water washout ASTM test: Scar size is measured on a test specimen. The higher the L-M score, the more applications the grease will provide lube protection. The lower the mm, the more protection a grease provides.

The performance dilution continues when the lithium complex grease is contaminated by both the lithium OH stearate grease and water. The lower the number, the less likely the grease will oxidize and the asrm it will last on the shelf.


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. The lower the percent change, the greater the mechanical stability of the grease.

Maximizing Grease Performance Through Optimal Compatibility

Acids, caustics and cleaning solutions can break grease down and corrode metal. 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.

Welding can be detected if any of the d2956 are noticed:. Toggle navigation Toggle search.


Maintenance and engineering personnel can minimize the risk associated with grease changes by doing each of the following: With these asfm in place, companies will enjoy improved operating efficiency, increased machine life and an overall cost effectiveness. Result values and what they mean: The purpose of this test is to determine the wear preventive characteristics of a lubricant.

Innovative data and testing tools aid the decision process through the analysis of two or more co-mingled greases. The 4 Ball EP test machine operates in a sliding or rolling motion. However, a true incompatibility situation may result when low-performing grease affects the performance of the higher performing grease, meaning another grease with more desirable intermixing attributes should be considered.

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. The Leon-Maxwell number is an excellent method to quickly and accurately evaluate a grease protection potential and as v2596 indication of a greases ability to be used in a wide variety of applications.


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

Determines the load-carrying properties of lubricating greases by measuring scaring on a test specimen. If incompatibility occurs, failure would be found in any of the tests of a given specification requiring no other testing; however, a borderline compatible reading requires additional application testing for conformance to the extreme temperatures and excessive pressure conditions of a given grease application. Select greases designed for the environment in which the equipment is operating.

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.

Maximizing Grease Performance Through Optimal Compatibility

Determines the temperature point at which grease changes from a semi-solid to a liquid. The ability of a grease to perform under extreme pressure conditions is determined by the load wear index LWI. Ideally, a supplier with an intensive research and development program is willing to perform tests before a lubrication change is implemented to protect machinery from failure or wear.

Seven tests for selecting the right grease Greases are used d25596 overcome real-world problems presented by operating environments and operating conditions of mechanical equipment.