anhydrous calcium grease compatibility

Some studies have been performed to improve the mixing and working of grease to better simulate machine conditions. ASTM D6185 (Standard Practice for Evaluating Compatibility of Binary Mixtures of Lubricating Greases) involves the mixing of the intended greases in ratios of 25-75, 50-50 and 75-25. Excellent for use at high temperatures, calcium sulfonate thickeners provide superior mechanical and shear stability. ). For the purpose of testing grease mixtures, the 25-75, 50-50 and 75-25 ratios are packed sequentially into the bearing by hand, and the adjacent housing area is packed half full. This potential effect is not easily determined. US2900340A US479244A US47924454A US2900340A US 2900340 A US2900340 A US 2900340A US 479244 A US479244 A US 479244A US 47924454 A US47924454 A US 47924454A US 2900340 A US2900340 A US 2900340A Authority US United States Prior art keywords acids grease … Mixing of greases with incompatible thickeners can result in the most immediate and obvious changes that interfere with effective lubrication. Some polyurea thickeners are completely compatible with lithium and lithium complex thickeners, while other polyurea thickeners are definitely incompatible with the lithium and lithium complex thickeners. It has a consistency similar to peanut butter. Multi-purpose, water resistant calcium white grease. The values measured include the yield stress, which can predict the hardening or softening the grease may undergo; the oscillation stress, which can give insight into the likelihood of oil separation and other effects; and recoverable compliance, which can help to identify those mixtures that might experience “channeling” or “tunneling” in the equipment housing. To help users understand the implications of mixing greases, ASTM International (formerly the American Society for Testing and Materials) Committee D02.G developed ASTM D6185 Standard Practice for Evaluating Compatibility of Binary Mixtures of Lubricating Greases in 1997. Viscosity is critical when selecting any lubricant. It could be expected that the mixture may be subject to softening, oil separation and a tendency to channel when allowed to persist in a mixed state in the motor housing. Do not stock additional products for convenience or brand loyalty. As an indication we have detailed the type of polymer we feel is suitable. Compatibility of grease mixtures is typically categorized as follows: Compatible – The properties of the mixture are similar to those of the individual grease. Identify the minimum number of products required to meet the design of the equipment in use and consolidate to that number. Compatibility of grease mixtures is typically categorized as follows: Compatible – The properties of … Most grease suppliers have data on certain grease combinations or are willing to perform the required testing for their customers. *Water resistant. Many mixtures will initially soften, often to the point of migration through seals or away from lubricated surfaces. Active structural stability. AAR Brake Cylinder Lubricant is an anhydrous calcium soap grease containing oxidation and corrosion inhibitors. It is interesting to note that these grease compatibility charts focus only on the family of thickener involved. While this standard has greatly improved the uniformity to which greases can be tested for compatibility, it should be noted that the three evaluation tests are static in nature. Figure 1. Our products can be exposed to a huge variety of chemicals. Testing should be conducted to determine if greases are compatible. Source: Adapted from NLGI Lubricating Grease Guide Note: Grease compatibility studies have been done and the most incompatible were aluminium complex, calcium complex, clay and polyurea-thickened greases. One area of the facility used a particular grease in all electric motors, while the remainder utilized another grease. K57 GRAPHITED CALCIUM GREASE Description: K57 is a premium quality anhydrous grease enhanced with laminar solid lubricant for use in anti-friction and plain bearing applications as well as slides, valves and plungers. The various descriptions used imply that some may have been copied from the others. It has excellent water resistance, good mechanical stability, and its low temperature properties are also dependent on the mineral oil used. The most common mixed soap grease is lithium/calcium as the lithium will improve the high temperature resistance of the resulting grease while the calcium improves the water washout and cost. How to Determine Grease Compatibility and Why It's Important also provides an indepth look at grease compatibility. Grease compatibility charts have been developed and circulated since the 1980s without much alteration. How we choose grease and how you can evaluate which grease actually stands up to extreme environments. Provide labels and color codes where possible to prevent confusion.

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