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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These tests can be conducted concurrently or sequentially with varying d296 for example, Innovative data and testing tools aid the decision process through the analysis of two or more co-mingled greases. More often than not, intermixed grease analysis shows minimal changes in grease performance, but this cannot be taken as the rule without proper assessment. Regardless of the manufacturing industry – be it food processing, mining, power generation d2956 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.
The higher the L-M score, the more applications the grease will provide lube protection.
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. 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.
Maximizing Grease Performance Through Optimal Compatibility
Maintenance Services and Products. 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. What the test measures: The higher the number, the greater the long-term protection.
Mud, water and steam can wash away grease, leaving metal unprotected.
Incompatibility can be identified from the performance or measured physical properties of two or more mixed greases. Scar size is measured on a test specimen. How do you know what grease will work best at protecting your equipment? Understanding Compatibility Understanding compatibility and contamination is the first step to optimal grease performance, plant operations and return on investment. Select greases with similar thickening systems. Make sure to use a valid business email address.
Click Here to see Tables 1 and 2.
Tribological Testing by 4 Ball Methods
The Aztm Gets Better: The ability of a grease to perform under extreme pressure conditions is determined by the load wear index LWI.
Relubricate frequently, taking care not to ast, especially motors. Organize Your Maintenance Online! With these elements in place, companies will enjoy improved operating efficiency, increased machine life and an overall cost effectiveness.
Wear scar properties and coefficient of friction of a lubricating grease can also be determined using the 4 Ball Wear configuration.
Advantages of Using Polyurea Grease. The dilution in performance is again nearly equivalent to the level of contamination, that is a 20 percent d25996 in the load wear index upon 20 percent contamination. 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.
Based on this value, one can formulate greases with different levels of extreme d22596 properties. 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.
Maximizing Grease Performance Through Optimal Compatibility
Determines a greases ability to withstand repeated mechanical stress. Grease Sampling Methods Matter. Dropping point ASTM test: Testing Overview More often than not, intermixed grease analysis ast, minimal changes in grease performance, but this cannot be taken as the rule without proper assessment. In the last issue, we described how tribological properties of a lubricant can be measured using the SRV. Result values and what they mean: Results are reported as pressure loss expressed in pounds per square inch psi with a functional range from 0 to psi.
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.
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. Seven tests for selecting the d256 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.
It is best to both increase the frequency and reduce the volume. The result is breakdown of grease, cold welding or galling. Simply, compatibility results when the performance properties atm the mixed greases are equal or better than the lower performing grease.
In some cases, performance properties of the mixed greases may be less than the lower performing 2d596, yet still meet customer specifications and requirements.
The final determination of compatibility comes with proper testing of greases in the application for key performance properties. Table 2 presents a selection of data points showing how sstm contamination by water and a lesser performing grease resulted in a reduction in performance of a higher performing product. It was found that all three greases showed good mechanical shear stability, antiwear performance and extreme pressure characteristics consistent d259 the specifications to which each individual grease was designed.
Water washout ASTM test: Oxidation stability ASTM test: