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.

Author: Malasar Dibei
Country: Kazakhstan
Language: English (Spanish)
Genre: Spiritual
Published (Last): 5 May 2015
Pages: 16
PDF File Size: 17.67 Mb
ePub File Size: 6.8 Mb
ISBN: 445-7-71991-876-3
Downloads: 20214
Price: Free* [*Free Regsitration Required]
Uploader: Milabar

An overview of a recently performed aviation grease study by Anderol demonstrates the necessity of proper grease testing within the actual manufacturing environment. Wear scar properties and coefficient of friction of a lubricating grease can also be determined using the 4 Ball Wear configuration.

What the test measures: 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.

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. Changes in physical properties would be reflected by a softening or hardening of grease aetm, or decreased shear stability upon mechanical working and even d25966 in thermal asrm identified by a reduction in dropping point.

Scar size is measured on a test specimen. Welding can be detected if any of the following are noticed:.


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, promoting business success and profitability.

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 lithium complex grease, sample No. Understanding compatibility and contamination is the first step to optimal grease performance, plant operations and return on investment. Determines the temperature point at which grease changes from a semi-solid to a liquid. Dropping point ASTM test: Penetration ASTM test name: 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. Determines a greases ability to withstand repeated mechanical stress.

Advantages of Using Polyurea Grease. 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. Figure 2 shows how the performance of a grease can be reduced by contamination from water or a lesser performing grease. The ability of a grease to perform under extreme pressure conditions is determined by the load wear index LWI.

Force applied to a bearing or journal that exceeds the load carrying capability of the grease. How do you know what grease will work best at protecting your equipment? The coefficient of friction is also measured throughout the 60 minute test with the average being reported at the end of the test.

The supplier should also spend time with maintenance personnel to make sure they know what to look for going forward. Acids, caustics and cleaning solutions can break grease down and corrode metal. The 4 Ball EP test machine operates in a d259 or rolling motion.

Shell 4-Ball Lubricant Tester | ASTM D | D | IP

Innovative data and testing tools aid d2569 decision process through the analysis of two or more co-mingled greases. 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.

Results are reported as percentage with a functional range from 0. Result values and what they mean: A graphic representation showing the dramatic difference in load-carrying capability between two grease samples sample No. This becomes important when maintenance teams are trying to reduce the number of greases that f2596 being purchased. Click Here to see Tables 1 and 2. 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.

The higher the number c2596 greater load-carrying ability. 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. A Testing Example An overview of a recently performed aviation grease study by Anderol demonstrates the necessity of proper grease testing within the actual ast, environment. The higher the number, the greater the long-term protection. 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 zstm conformance to the extreme temperatures and excessive pressure conditions of a given grease application.


Based on this value, one can formulate greases with different levels of extreme pressure asrm. Determines resistance of a lubricating grease to washout by water Result values and what they mean: Incompatibility can be identified from the performance or measured physical properties of two or more mixed greases.

Simply put, all the grease samples were found to be compatible with one another. Make sure to use a valid business email address.

ASTM D2596 – 15

Select greases designed for the environment in which the equipment is operating. However, a true incompatibility situation may result when low-performing grease affects the performance of the higher performing grease, meaning another grease with more asrm intermixing attributes should be considered. In particular, the results of the load-carrying capability or four-ball extreme pressure testing illustrated the aspect of performance dilution upon contamination.

Astj, compatibility results when the performance properties of the mixed greases are equal or better than the lower performing grease. The performance dilution continues when the lithium complex grease is contaminated by both the lithium OH stearate grease and water.

In some cases, performance properties of the mixed greases may be less than the lower performing grease, yet still meet customer specifications and requirements. Results are reported as percent change expressed in whole numbers with a functional range from 0 to percent. Determines resistance of lubricating greases to oxidation and helps determine shelf life of grease.

This article was written by admin