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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The lower the mm, the more protection a grease provides.

The higher the L-M score, the more applications the grease will provide lube protection. Toggle navigation Toggle search. In addition, because equipment users usually do not have the proper resources to perform testing themselves, it is the responsibility of the grease supplier to measure grease compatibility with dropping point, penetration and high-temperature performance test machines.

Tribological Testing by 4 Ball Methods

A graphic representation showing the dramatic difference in load-carrying capability between two grease samples sample No. The dilution in performance is again nearly equivalent to the level of contamination, that is a 20 percent reduction in the load wear index upon 20 percent contamination.

Mud, water and steam can wash away grease, leaving metal unprotected. Figure 2 shows how the performance of a grease can be reduced by contamination from water or a lesser performing grease. The performance dilution continues when the lithium complex grease is contaminated by both the lithium OH stearate grease and water.


For study purposes, two greases sample No. Regardless of the manufacturing industry – be it food processing, mining, zstm generation or aviation – plant managers and engineers need to work hand-in-hand with a supplier employing highly trained professionals astj expertise in industrial lubricants and applications to ensure compatibility.


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

Tribological Testing by 4 Ball Methods

Advantages of Using Polyurea Grease. The supplier should also spend time with maintenance personnel to make sure they know what to look for going forward. For this experiment, a low-level, 10 percent by weight, of contamination was implemented to avoid harmful degradation of the individual greases and to simulate a situation common to typical grease changeouts. The Best Gets Better: A Testing Example An overview of a recently performed aviation grease study by Anderol demonstrates sstm necessity of proper grease testing within the actual manufacturing environment.

Organize Your Maintenance Online! 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. Taking this precautionary measure assures reliability and performance of equipment.

Determines the strenghth of the boundary film between metal surfaces that provides extended protection. The ability of a grease to perform under extreme pressure conditions is determined d296 the load wear index LWI.



Oxidation stability ASTM test: The equation combines several ASTM test methods and properties that best represent performance. Table 2 presents a selection of data points showing how low-level contamination by water and a lesser performing grease resulted in a reduction in performance of a higher performing product. With these elements in place, companies will enjoy improved operating efficiency, increased machine life and an overall cost effectiveness. D What the test measures: Click Here to see Tables 1 and 2.

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. Determines the temperature point at which grease changes from a semi-solid to a liquid.

Dust, fibers and abrasive particles can combine with grease and grind away metal. Incompatibility can be identified from the performance or measured physical properties of two or more mixed greases.

The problems can be characterized in three main categories: 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.

In the asrm issue, we described how tribological properties of a lubricant can be measured using the SRV.