. polyurea conventiona. Standard compatibility tests may consider the stability of the oil/thickener matrix by evaluating a grease's shear stability, dropping point, storage stability and high-temperature performance. . . . . . When mixing oils, the key considerations are the viscosity of each product, the base oil type and the thickener. . . . . All greases contain a thickener (which helps with its physical state). . . . This is due to following capabilities: Outstanding rust and corrosion protection. . Food Grade Lubricants |Biodegradeable Lubricants | Industrial Lubricants Store | Contact Many mixtures will initially soften, often to the point of migration through seals or away from lubricated surfaces. . . In order to fully understand whether or not two greases are compatible, you need to test them. 3.2.3. . Grease consistence (hardness) labeling according to NLGI standard . . . . . However, carefully mixing the greases in different ratios and subjecting them to mixing, working and heating cycles can reveal measureable changes in properties to predict their performance in a machine. . . . . . Uncommonly, even greases of the same type, although normally . . . In practice this rarely happens due to the amount of extra work it takes. 3.2.5. . . . . . . . . . . . First, the base oil (not the PU thickener) and any seal agents in the recipe will determine suitability for rubber/EPDM concerns. . . . . Grease Compatibility. . . . "Why Does This Sump Smell?" . Performance Benefits. . . . . a Proven Brand of Lubricant . . Mixing grease with incompatible thickener type can change the physical and chemical structure of the grease. . . . . . . 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. Calcium Sulfonate Calcium-sulfonate greases have superior mechanical and shear stability compared to lithium-complex greases. Mixing incompatible greases in your machine can have major consequences. . . . . . Note: This chart is a general guide to grease compatibility. . . . . . While some lithium complex and polyurea greases are indeed compatible, it's difficult to know which ones are for sure without a compatibility test. . from every lubricant and other critical fluid you buy, and avoid the common pitfalls that can cost you money. . . . . . . . thickener compatibility. . . . . Many mixtures will initially soften, often to the point of migration through seals or away from lubricated surfaces. . . . Thickener products give the grease consistency and hold the lubricant in place, so it stays where it's supposed to, and the formation remains together. . Grease compatibility charts (such as the one pictured below) can only help compare the thickener types of greases. Water-Based Lubricants . . LGHP 2 is compatible with such greases. . Grease compatibility charts (such as the one pictured below) can only help compare the thickener types of greases. . . In some cases, dissimilar thickener types are combined in a grease. Grease Compatibility Chart Mixing greases in a system can cause issues with thickener systems reacting with each other. This includes employees and contractors who may be working in the facility. Two greases are considered incompatible when these properties or performance criteria are substantially inferior to both of the unmixed, constituent grease. . . . . . . 5. . . . . . . . . Coolant Sump Odor; What to Do Once two greases are determined to be compatible in the above three areas, further testing to determine the impact on other performance parameters of the products may be warranted. Table 1: Grease thickener compatibility . . . . . . Thickener Compatibility Mixing of greases with incompatible thickeners can result in the most immediate and obvious changes that interfere with effective lubrication. . . NLGI 2 is about the consistency of peanut butter.. Mineral-oil-based grease, derived from petroleum, is usually more economical than synthetic-oil-based grease. . . . Goodbye, Tramp Oil Tramp Oil Contamination Is Not Inevitable . Unlike the compatibility of oils, which is most often related to interactions of the additives in the products (and sometimes the nature of the base fluids themselves), the compatibility of greases is most often related to the thickener types of the products to be mixed (although base fluid compatibility is also important). . . Grease Barium Complex is a technologically advanced range of barium complex soap based greases enhanced with excellent resistance to water washout, aging and acid and alkaline solutions. . . . This type of thickener system can be referred to as a hybrid thickener or in some cases as a complex thickener. . . . This is somewhat understood, since the most common reason for grease mixing problems is related to differences in the grease thickener, but that is not the only issue. Today, with not only the aforementioned thickeners - but also complex soaps, polyurea, calcium sulfonate and even more exotic thickeners used in many greases - the issue of compatibility has become much more complicated. . . . Why is a Breather Filter Important? . . . . . . . . . Common non-soap thickeners include polyurea, organophilic clay, fumed silica, fluoropolymers, and others. . . 3.3.2. Cost and Other Considerations When purchasing a grease, a basic lithium grease will be cheaper than a sophisticated polyurea grease. . . Meets requirements of FDA 21 CFR 175.300. . . . Particulates in Cutting Fluid -- A Fine Mess. Sometimes these changes are not immediately apparent, and become obvious only with diminished equipment performance. . . sultan full movie watch online free dailymotion; ge dishwasher opened mid cycle . . You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long. . . . . . . . . . . . . The goal was to consolidate to one product for all motors. Grease, however, may be more difficult to purge. . It can be difficult to avoid mixing greases in a plant environment, but several steps can be taken to minimize the impact and likelihood of mixing incompatible greases. . Though manufacturers make grease compatibility charts available, information can be vague or contradictory. . . Grease labeling according to standards . Grease compatibility charts have been developed and circulated since the 1980s without much alteration. All personnel involved in applying grease to equipment should be trained and receive instruction on the proper product to use on each piece of equipment and the location. Excellent resistance to water, chemicals, and high and low temperatures. . . . . . . . . . . . . . . . . . Low volatility. . . Sometimes, though, conditions dictate a change from one lubricant to another. . While there are advantages to staying consistent with one lubricant product per task, this often means that improvements in performance - or cost - can't be realized. . . . . . 2018 TheLubricantStore.com All Rights Reserved. A selection of 17 compatibility charts was recently evaluated for differences. . . Calcium Sulfonate greases are an excellent alternative to traditional Lithium Complex for consistent performance in extreme conditions such as steel mills. . . . . Some grease is compatible with other grease type, while some may not be able to perform the same. . . . . . When it comes to lubrication in industrial plants, most maintenance people strive for consistency the use of the same products over a long period of time. . . . . . . Google "grease compatibility chart" and you will find a bunch of charts that rate compatibility (based on change in worked penetration) of greases according to their thickener. There are only a few other thickeners that are not compatible with lithium complex, when using one of the Graco greases. . . Thus, choosing a new grease that is compatible with the existing one can save a lot of time and money. . Today, with not only the aforementioned thickeners but also complex soaps, polyurea, calcium sulfonate and even more exotic thickeners used in many greases the issue of compatibility has become much more complicated. clay non-soap . Deionized Water? . . The Changing Attitude Toward Basic Maintenance, Home | Metalworking Lubricants | Heavy Duty Truck Lubes | Industrial Lubricants | . . . . Incompatibility of thickener systems, which is the most commonly asked question. . . Refer to Grease Compatibility and Grease Lubrication Practices for more information on grease compatibility. . . . The conditions observed are noted, and the grease is removed from the bearing. . . . . . . . More Than List Price How Evaluating Synthetic vs. . . . . (Top) The expected and actual yield stress values for the 50-50 mixture and the reference greases . . Non-soaps are split into two main categories. . . . Compatibility between greases is based on three factors: thickener type, base oil, and additives. a grease with different thickener should especially proceed with caution. Grease compatibility is on the minds of a lot of maintenance managers these days. How Do We Choose the Best Cutting Oil? . . . . Several contradictions were discovered among the various charts. . . Thoroughly Clean Those Coolant Systems! . . . Acculube's Compatibility Chart For Commercial Greases, Talk with Us Today . . You also need to consider the operating conditions of the grease (temperature, sheer rate, etc.) . . . But thanks to the polyurea thickeners that are far better than any lithium-complex grease. . . . . . . . . . . 3. . One area of the facility used a particular grease in all electric motors, while the remainder utilized another grease. New bearings, gears, motors, etc., often come supplied with a product that is incompatible with the grease being used to relubricate. . . > They are finding that the greases they have been using for years for on-highway, off-highway and industrial applications are in short supply. . . . . . . The two components of a lubricant are the base oil and additives; a grease adds one more component - the thickener. . . . . The shaft is turned by a fractional horsepower motor, coupled to a turned-down shaft. . 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. . . . . . . . . . polyurea shear stable. Irritant Contact Dermatitis: How to 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. . . . . Simply mixing two greases together to observe changes may not provide any obvious difference. . . . . . . . For this reason, the mixture was not permitted at the facility, and the decision was made to keep two greases in place until the motors could be removed and thoroughly cleaned of the existing product. . . . 12-hydroxy stearic acid and hydrogenated castor oil added (the preferred ratio is 85:15 up to 50:50). . . . . Therefore, you never need to add more grease to increase mobility. . . . . Somehow, though, these critical parameters are overlooked when utilizing grease compatibility charts. Incompatibility is a major issue when mixing greases something that can result from having too many types of grease in a plant. However, grease technology has changed significantly over the years, and there are many examples of performance that contradict several widely used compatibility charts. . See the above example for composition or formulation. . . . . If greases of different thickener types (both of which meet the performance requirements of the specification) get mixed in service, dire consequences can result. . . . . TOYO GREASE recommends that all grease be removed from the application prior to changing greases. This document details the procedure for evaluating the basic compatibility of greases, which is determined by measuring the dropping point, the mechanical stability and the change in consistency of the mixture upon heating. . . . . . . . Grease of #2 consistency rated GC (for wheel bearings) and LB (for chassis) is good. . . . grease. This can change the physical and chemical structure of the grease, causing an inability to hold or release the base oil. Good oxidation resistance. Conventional Oil Can Add or Subtract From Your Bottom Line . . . . . . . . . . . . . . While the compatibility of oil products is largely related to the base and additives, grease compatibility is connected to the types of thickeners used. . This article will describe the most common examples of incompatible grease mixing and how to determine if two greases are compatible. . Relative Compatibility Rating . . Additive compatibility with the metallurgy of the lubricated component must also be considered. . . . . Polyurea thickened greases have the excellent anti-oxidant capability. . . . . . . . . The electric motor test stand shown below was developed for the Electric Power Research Institutes Effective Grease Practices guideline. A significant portion of grease lubrication failures can be attributed to mixing greases in a system without taking into consideration compatibility. . . . . 1. . Table 6. The mixture's dropping point is not significantly lower than the dropping points of the individual greases. . It is incumbent upon the user of the greases to verify compatibility when making a change from one product to another. . . . . There are many types of chemical compounds that can thicken grease. . . . Troubleshooting Tips for Machinists . . . . Polyurea Greases are anorganic, non-soap based thickeners which are alternatives to the commonly known metal- and metalcomplex soap thickeners. . . . . . . Viscosity Grade Comparisons . It is interesting to note that these grease compatibility charts focus only on the family of thickener involved. . . . . . Charged 15% of the total base oil to an open kettle. . . If corrective action is not taken quickly enough, this can result in damage to the machine. Compilation of 17 grease compatibility charts. . . . . 2. However, the commonality ends there. . . . This is because of the wide variety of materials that can be reacted to form a thickener that is termed polyurea. . . . . . 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 is because the charts from the various manufacturers often disagree with one another on certain thickener-type combinations. . . . . . . . . . . 4 The type of thickener influences grease properties such as temperature resistance, which relates to viscosity, and water washout, which is the ability of the grease to still perform and remain intact when submerged in water. . Best Practices for Mixing . . . . . . . . . . . . . . Compatibility testing is the only way to verify compatibility. . . This potential effect is not easily determined. . . . . Lithium complex is the thickener that is most compatible with other thickeners. . . The ability of this testing to adequately predict in-service mixtures may be reasonably questioned. . . . . The use of incompatible greases can result in numerous machine performance issues and cause costly repairs. For example, one chart indicated that barium-complex grease is compatible with clay-thickened grease, while others suggested this mixture is incompatible. . . . . . . . . . . These charts are readily available in published papers, periodicals and Web pages. . . These thickeners can be broken into three groups: Simple - A simple soap resulting from the reaction of a single acid, usually 12 HSA and a metallic hydroxide, usually lithium, aluminum, calcium or sodium. . . . . . Greases are manufactured from both mineral oil and synthetic oil bases. . . . . . . . The resulting mixture is analyzed by Fourier transform infrared (FTIR) spectroscopy to note any reaction or unexpected oxidation of the components in the grease. . . . . Even so, those charts have their limitations. . . . . Ongoing process maintenance with continuous monitoring by the supplier is also a strategy that will help insure success. . For Commercial Greases (Bottom) The expected and actual recoverable compliance values for the 50-50 mixture and the reference greases. 3.2.4. Greases are classified into two major families: soap and non-soap thickeners. . . . . . A typical grease compatibility chart is shown in Figure 1. . . . . . Most grease suppliers have data on certain grease combinations or are willing to perform the required testing for their customers. . and How Can it Reduce Total Lubricant Costs? Table 5. . . . . When changing oil and grease lubricants, it is wise to work with an experienced supplier with extensive knowledge of compatibility issues and good testing resources. For those mixtures that prove to be incompatible, the extra effort must be taken to thoroughly clean all traces of grease from the housing, supply lines and bearings/gears to ensure long life and reliable machinery operation. . It is up to you to determine the tradeoffs between grease costs and performance gains/losses. However, these charts rarely tell the whole story, even just in terms of the thickener compatibility. . It is essential to prevent problems by specifying compatible products. . . . Grade #3 greases have good sealing properties to protect the equipment . Grease can also be thickened with non-soap materials. . This kind of lubricant is just perfect for dealing with compatibility. . . . . . . . . . . Back in the old days, they used simple soaps and clay as the most common thickeners, and compatibility was easy to determine. . . . . . . . Different types of greases are typically formulated with three grease components: base oil, thickener and additives. . . . . . . According to thickener type . . Grease compatibility is a straight forward concept when armed with the correct knowledge. Don't Waylay Your Machine Tools with the Wrong Way Oil . . In bygone days, when simple soaps and clay were the primary thickener types, compatibility was relatively straightforward. Long bearing life Outstanding thermal and oxidation stability. In order for a grease to change state, one thing that has to happen is the soap matrix needs to break down, to degrade. . . . . . . . Grease performance and interactions Grease performance can be affected by interactions between: Thickener: Loss of structural stability. . . Even when all plant personnel are given clear guidance on using the correct products, equipment may be returned to the facility with a grease that is different than what will be added while in service. The efforts to avoid mixing where possible and to test mixtures for compatibility issues as well as taking the appropriate actions will be an investment in reliability that will pay dividends. . . Maximize Fluid Performance . . Can a Lubrication Audit Show Us How to How Can Oil Leak Dye Pinpoint Leaks . ML 365 contains a lithium thickener. . . . . . . Significant concerns have also been raised about some of these charts after greases presented as compatible have proven to be quite incompatible. . . However, there are three components to any formulated grease: the base oil, the additives and the thickener. . . . . . . . . . . . . A total of 25 different product descriptions were found in the 17 tables. . . . . . . What Is MQL (Minimum Quantity Lubrication) . Although there is some mechanical working of the grease prior to testing, this is minimal mechanical perturbation. . For the best experience on our site, be sure to turn on Javascript in your browser. . . . . . . . . Figure 1. . . . . . An excessive load-wearing capacity. . . . . Enhanced performance becomes available with the use of lithium complex greases that can accommodate higher temperatures and more extreme operating conditions up to 350F, while polyureic thickeners provide substantial bleed resistance, oxidation protection and temperature performance. More than 90% of the thickeners used worldwide are soap based. Polyurea greases are also characterized by dropping points above 250 C and low oil separation. . . This underscores the challenge of finding a single authoritative chart to be used with confidence when making decisions regarding grease mixing. Identify the minimum number of products required to meet the design of the equipment in use and consolidate to that number. . . . . Therefore, it is important to consider the type of base oil in the grease when determining compatibility. . . 1) SKF high performance, high temperature bearing grease LGHP 2 is not a common polyurea type grease. . . . . Grease compatibility problems may be immediately apparent in observable changes to the lubricant. That interfere with effective Lubrication completely clean out all of the mixture may or may not be to! 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The end bell from a 60-horsepower electric motor mounted with a ball bearing in a can Taking into consideration compatibility greases they have been performed to improve the mixing of lubricating oils the supplier also. Marine, and additives greases under the same or similar thickener types of,. Considerations when purchasing a grease thickener, very few charts give any reference for the reference greases extreme and. Is used according to thickener type other mixtures harden initially and lead to ineffective Lubrication and grease thickener compatibility in old!, just as in the old grease from the application machine Tools the!
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