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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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. Acids, caustics and cleaning solutions can break grease down and corrode metal.
Maximizing Grease Performance Through Optimal Compatibility
Make sure to use a valid business email address. More often than not, intermixed grease analysis shows minimal changes in grease performance, but aatm cannot be taken as the rule without proper assessment.
What the test measures: The better the lubricant is at preventing wear, the smaller the wear scar will be on the three stationary balls.
Figure 2 shows how the performance of a grease can be reduced by contamination from water or a lesser performing grease. The final determination of compatibility comes with proper testing asmt greases in the application for key performance properties.
Results are reported as percent change expressed in whole numbers with a functional range from 0 to percent. This becomes important when maintenance teams are trying to reduce the number of greases that are being purchased. These tests can be conducted concurrently or sequentially with varying ratios for example, Oxidation stability ASTM asstm D What the test measures: The supplier should also spend time with maintenance personnel to make sure r2596 know what to look for going forward.
Determines the strenghth of the boundary film between metal surfaces that provides extended protection.
Advantages of Using Polyurea Grease. Three measurements go into determining the LWI.
An overview of a recently performed aviation grease study by Anderol demonstrates the necessity of proper grease testing within the actual manufacturing environment.
The result is metal-to-metal contact, premature wear and increased heat. Click Here to see Tables 1 and 2.
The Leon-Maxwell number is an excellent method to quickly and accurately evaluate a grease protection potential and as an indication of a greases ability to be used in a wide variety of applications. The answers are in a few ASTM test methods. Contemplating a switch of grease products, due to poor performance or process change, brings to light the critical issue of compatibility.
Select greases designed for the environment in which the equipment is operating. The result is breakdown of grease, cold welding or galling. Understanding compatibility and contamination is the first step to optimal grease performance, plant operations and return on investment.
Even though the study found no grease incompatibility issues, changes in grease performance were measured and documented.
Shell 4-Ball Lubricant Tester | ASTM D | D | IP
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. In addition, where possible the supplier should be present throughout a grease changeout to make sure the new grease runs correctly.
The equation normalizes the results and produces a value that can be used in the selection, application and consolidation process from typical to extreme environments. The purpose of this testing is to determine the load carrying capabilities of a lubricating grease under high load applications.
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. 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.
Determines the temperature point at which grease changes from a semi-solid to a liquid.
Maximizing Grease Performance Through Optimal Compatibility
The equation combines several ASTM test methods and properties that best represent performance. Maintenance and engineering personnel can minimize the risk associated with grease changes by doing each of the following:. Create your own user feedback survey.
Select greases with similar thickening systems.
FOUR BALL MACHINE ASTM D2266 & ASTM D2596
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. Wear scar properties and coefficient of friction of a lubricating grease can also be determined using the 4 Ball Wear configuration. The dilution in performance is xstm nearly equivalent to the level of contamination, that is a d22596 percent reduction in the load wear index upon 20 percent contamination.
The problems can be characterized in three main d259 An incompatibility issue could be reflected in reduced lubricating performance due to the modified composition of the fluids and additives from intermixing. Seven tests for selecting asmt 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.
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. With these elements in place, companies will enjoy improved operating efficiency, increased machine life and an overall cost effectiveness.
The higher the number, the greater the long-term protection. Dust, fibers and abrasive particles can combine 2d596 grease and grind away metal.