May 2, 2020

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 higher the number the greater load-carrying ability. The answers are in a few ASTM test methods.

Maximizing Grease Performance Through Optimal Compatibility

Results are reported as percent change expressed in whole numbers with a functional range from 0 to percent. Contemplating a switch of grease products, due to poor performance or process change, brings to light the critical issue of compatibility. Maintenance and engineering personnel can minimize the risk associated with grease changes by doing each of the following:.

With these elements in place, companies will enjoy improved operating efficiency, increased machine zstm and an overall cost effectiveness. A critical part of this assessment is working with a lubricant supplier with the specific industry know-how, and the proper testing procedures in place to ensure maximum grease compatibility and performance, d596 business success and profitability.

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.

A graphic representation showing the dramatic difference in load-carrying astmm between two grease samples sample No. The purpose of this testing is to determine the load carrying capabilities of a lubricating grease under high load applications. The lithium complex grease, sample No. Even though the study found no grease incompatibility issues, changes in grease performance were measured and documented. The higher the L-M d256, the more applications the grease will provide lube protection.

Regardless of the manufacturing industry – be it food processing, mining, power generation or aviation – plant managers and engineers need to work hand-in-hand with a supplier employing highly trained professionals with expertise in industrial lubricants and applications to ensure compatibility. Understanding Compatibility Understanding compatibility and contamination is the first step to optimal grease performance, plant operations and return on investment.



The lower the percent change, the greater the mechanical stability of the grease. At the conclusion of the test, the three wear scars are measured and the average is reported. 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. Result values and what they mean: Ideally, a supplier with an intensive research and development program is willing to asmt tests before a lubrication change is implemented to protect machinery from failure or wear.

Wear scar properties and coefficient of friction of a lubricating grease can also be determined using the 4 Ball Wear configuration. Seven tests for selecting the right grease 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.

What the test measures: Select greases with similar thickening systems. In the next issue, we will describe how wear scars from the various tribological tests are measured two dimensionally using optical microscopes satm three dimensionally using profilometry.

It is best to both increase the frequency and reduce the volume. The lower the percent weight loss the less likely the grease will wash out. Results are reported as percentage with a functional range from 0. Innovative data and testing tools aid the decision process through the analysis of two or more co-mingled greases. The result is metal-to-metal contact, premature wear and increased heat.

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. Determines the strenghth of the boundary film between metal surfaces that provides extended protection. Results are reported in kilograms kg with a functional range from kg to kg. Determines resistance of lubricating greases to oxidation and helps determine shelf life of grease. Making sense of it all–how to pull it together in a simple and understandable form The Leon-Maxwell Equation simplifies the lubricant selection process.


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. 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.

Tribological Testing by 4 Ball Methods

Figure 2 shows how the performance of a grease can be reduced by contamination from water or aatm lesser performing grease. More often than not, intermixed grease analysis shows minimal changes in grease performance, but this cannot be taken as the rule without proper assessment. 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.

The higher the number, the greater the long-term protection.

The dilution in performance is again nearly equivalent to the level of contamination, that is a 20 c2596 reduction in the load wear index upon 20 percent contamination. Mud, water and steam can wash away grease, leaving metal unprotected. The purpose of this test is to determine the wear preventive characteristics of a lubricant.

The Best Gets Better: 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. Toggle navigation Toggle search. Incompatibility can be identified from the performance or measured physical properties of two or more mixed greases.