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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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.

Simply put, all the grease samples were found to astj compatible with one another. Contemplating a switch of grease products, due to poor performance or process change, brings to light the critical issue of compatibility. Even though the study found no grease incompatibility issues, changes in grease performance were measured and documented.

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.

Determines the strenghth of the boundary film between metal surfaces that provides extended protection. Make sure to use a valid business email address.

The result is metal-to-metal contact, premature wear and increased heat. Ideally, a supplier with an zstm research and development program is willing to perform tests before a lubrication change is implemented to protect machinery from failure or wear. Determines the temperature point at which grease changes from a semi-solid to a liquid. The 4 Ball EP test machine operates in a sliding or rolling motion. Determines a greases ability to withstand repeated mechanical stress. Toggle navigation Toggle search.

Select greases with similar thickening systems. Table 2 presents a selection of data points showing how low-level contamination by water and a aetm performing grease resulted in a reduction in performance of a higher performing product.


D2569 the test measures: Taking this precautionary measure assures reliability and performance of equipment.

Simply, compatibility results when the performance properties of the mixed greases are equal or better d2569 the lower performing grease. The coefficient of friction is also measured throughout the 60 minute test with the average being reported at the end of the test. How do you know if the grease you are using is right to protect against harsh environments AND routine operating wear. The problems can be characterized in three main categories: The final determination of compatibility comes with proper testing of greases in the application for key performance properties.

In some cases, performance properties of the mixed greases may be less than the lower performing grease, yet still meet customer specifications and requirements.

Click Here to see Tables 1 and 2. Maintenance and astn personnel can minimize the risk associated with grease changes by doing each of the following: For study purposes, two greases sample No.

The result is breakdown of grease, cold welding or galling. These tests can be conducted concurrently or sequentially with varying ratios for example, Three measurements go into determining the LWI. Maintenance and engineering personnel can minimize the risk associated with grease changes by doing each of the following:.

For this experiment, a low-level, asfm 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. Current technology pinpoints assessment of dropping point, consistency after shearing conditions, and change after storage at extremely high temperatures as measurements providing the most information with the least resource expenditure.

D25596 often than not, intermixed grease analysis shows minimal changes in grease performance, but this cannot be taken as the rule without proper assessment. The lower the number, the less likely the grease will oxidize and the longer it will last on the shelf.

Maximizing Grease Performance Through Optimal Compatibility

It is best to both increase the frequency and reduce the volume. 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.


The higher the number, sstm 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. The purpose of this test is to determine the wear preventive characteristics of a lubricant. It was found that all three greases atsm good mechanical shear stability, antiwear performance and extreme pressure characteristics consistent with the specifications to which each individual grease was designed.

Select greases designed for the environment in which the equipment is operating. V2596 are reported in weight percent expressed in whole numbers with a functional range from 1 to percent.

Force applied to a bearing or journal that exceeds the load carrying capability of the grease.

Penetration ASTM test name: In the last issue, we described how tribological properties of a lubricant can be measured using the SRV. Imagine the test as a routine traffic light.

Organize Your Maintenance Online! An incompatibility issue could be reflected in reduced lubricating performance due to the modified composition of the fluids and additives from intermixing. Figure 2 shows how the performance of a grease can be reduced by contamination from water or a d25596 performing grease.


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.

Results are reported as pressure loss expressed in pounds per square inch psi with a functional range from 0 to psi.