. . . . . ML 365 contains a lithium thickener. . . . Therefore, it is important to consider the type of base oil in the grease when determining compatibility. . . . . . . In order for a grease to change state, one thing that has to happen is the soap matrix needs to break down, to degrade. . . . . . . Table 5. . . . . . . . 3.2.3. . . . . . This underscores the challenge of finding a single authoritative chart to be used with confidence when making decisions regarding grease mixing. What Is MQL (Minimum Quantity Lubrication) . 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. . . It is wear resistant for use in a wide range of bearings.. NLGI viscosity grade is a rating of a grease's consistency. . . More Than List Price How Evaluating Synthetic vs. While some lithium complex and polyurea greases are indeed compatible, it's difficult to know which ones are for sure without a compatibility test. Issues with oil and grease compatibility most often manifest in problems including abnormal consistency and separation, leakage, insufficient bleed in contact zones, and premature aging. . Shows also excellent performance in combination with hot water . clay non-soap 2. . . . 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. . . . Prevent Metal Corrosion . . . . . . . . . Greases based on simple lithium soaps (lithium stearate or lithium 12-hydroxystearate) and lithium complex soaps (containing simple soap and a complexing agent, such as lithium azelate) may or may not be compatible with polyurea greases. . 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. . . . Sheer stabilized Polyurea is compatible with just about all thickeners (much more so than the non-sheet stabilized). . . . . . . Incompatibility of thickener systems, which is the most commonly asked question. I=Incompatible, C=Compatible, and B=Borderline. 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. Upon observation, it becomes obvious that several of the charts are derived from the others. . . with Optimal Water Quality . > . . . . How to Choose an Grease labeling according to ISO standard . . . . . . . . . . . . Mixing greases in a system can cause issues with thickener systems reacting with each other. . . . . . . The Changing Attitude Toward Basic Maintenance, Home | Metalworking Lubricants | Heavy Duty Truck Lubes | Industrial Lubricants | If you are a human seeing this field, please leave it empty. Made with moisture-resistant thickeners, this grease stays in place in wet environments. . . . . . Soaps can be grease thickeners, while non-soap thickeners include polyurea, organophilic clays (e.g., bentonite) and other materials. . . . . . . . . Grease compatibility charts have been developed and circulated since the 1980s without much alteration. . In practice this rarely happens due to the amount of extra work it takes. . . Compatibility testing is always the best option, since the base oil and elastomer must also be taken into consideration. . Water-Based Lubricants . . . . . . . . . Reduce Foam: How to Prevent Foam in Oil See the above example for composition or formulation. More than 90 % of thickeners are soap based. . . New bearings, gears, motors, etc., often come supplied with a product that is incompatible with the grease being used to relubricate. . 2017 by Accurate Lubricants & Metalworking Fluids, Inc. located in Dayton, Ohio U.S. All rights reserved. . . Thickener Compatibility Mixing of greases with incompatible thickeners can result in the most immediate and obvious changes that interfere with effective lubrication. . . . . . Greases are manufactured from both mineral oil and synthetic oil bases. . . You then compare these mixtures to the original in terms of dropping point, shear stability, and consistency after prolonged storage at an elevated temperature. . . . Consistent lubrication frequency, without over- lubricating, also promotes a smooth transition. . . . . . . . . First, the base oil (not the PU thickener) and any seal agents in the recipe will determine suitability for rubber/EPDM concerns. . . Mixing incompatible greases in your machine can have major consequences. . . . . . . The areas highlighted in yellow indicate values of concern. . . 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. . The following properties are impacted by the chosen thickener: How to use a Grease Gun . . . Mixing of greases with incompatible thickeners can result in the most immediate and obvious changes that interfere with effective lubrication. . Use Fewer Lubricants, and Save Costs? . . In order to minimise issues arising from incompatibilities, ExxonMobil laboratories routinely test different grease technologies to assess their compatibility when mixed with other grease products in various ratios.The table below also gives an indication of the compatibility of various grease thickener combinations. . 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. How Can Lubrication Best Practices . . . Excellent resistance to water, chemicals, and high and low temperatures. . . . In some cases, dissimilar thickener types are combined in a grease. . . Hydraulic System Maintenance This increases the likelihood of mixing. . . 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. Simple soaps are the most . Some may have been referring to the same product categories but failed to use common nomenclature, so it is difficult to determine where there might be an overlap. . . . grease. . . . . . . . . . . . Though manufacturers make grease compatibility charts available, information can be vague or contradictory. . . . . . . . . . . . . . . . Table 1 shows the labels used in these charts and how many times these descriptions appear in the charts. Grease compatibility and conversion guidance Tech topic Key insight Compatibility testing enables users to make informed decisions when converting from one grease to another. . Thickeners may be fibrous, spherical or platelets, and have an impact on the final grease properties. . . polyurea-thickened greases. . . However, the unreliability of these charts and the complex interaction of base oils, additives and grease thickeners require that a more certain approach be employed for optimal equipment performance. . . Table 2 shows the product information for both greases tested. . . . . Others need to be inert due to material compatibility, or they may be in aggressive environments where they are exposed to corrosive or acidic environments. . . . . . If this can not be carried out, Table 1: Grease Compatibility Generic Chart NOTE: This matrix is based on information commonly used in industry. Remember, this chart may not be accurate for all greases. . . . hbspt.cta.load(3951034, 'c99217f3-09e7-4751-bc3a-7739dac44a0e', {}); Grease Compatibility Chart and Reference Guide, Spectro Scientific FluidScan 1100 - Handheld Infrared Oil Analyzer, Shell Turbine Oil with Gas To Liquid Technology (Turbo S4 X & GX), How to Cost Justify a Lubrication Program. . . Particulates in Cutting Fluid -- A Fine Mess . . . . . Lubricants often fail to perform as specified when combined with other products, even in small concentrations. . . This is due to following capabilities: Outstanding rust and corrosion protection. . . . Maintaining Gear Box Lubrication . . . . Elemental spectroscopy values for the reference greases and the 50-50 mixture. . Grease Compatibility Chart. . 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. . Charged 15% of the total base oil to an open kettle. . . . . . 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. . . . It is understood that when oils are mixed, any incompatibility in the additive packages will result in poor performance and often additive reactions creating deposits. . . . . . This test stand consists of the end bell from a 60-horsepower electric motor mounted with a ball bearing in a stub shaft. . . . Motor Bearing Grease . . . It is essential to prevent problems by specifying compatible products. . To learn more about NLGI, visit www.nlgi.org. . . . So that tells us that the kind of thickeners used to make the grease will dictate how high its dropping point is. David Turner works for Shell Global Solutions Inc. and is the co-chairman of the National Lubricating Grease Institutes technical committee. . . . . . . . . . . . . . . . . According to thickener type . . . Coolant Concentration Mixing grease with incompatible thickener type can change the physical and chemical structure of the grease. . Figure 1. This generally allows for smooth operation of equipment. . It is interesting to note that these grease compatibility charts focus only on the family of thickener involved. . . . . . . 12-hydroxy stearic acid and hydrogenated castor oil added (the preferred ratio is 85:15 up to 50:50). . . . . . . . According to intended use area . . . . How Can Oil Leak Dye Pinpoint Leaks Grease consistence (hardness) labeling according to NLGI standard . According to a 2018 survey of worldwide grease production, 74.18%, by volume, contain lithium soap thickener. . . . In order to fully understand whether or not two greases are compatible, you need to test them. More than 90% of the thickeners used worldwide are soap based. Polyurea greases offer excellent performance in industrial equipment. . Relative Compatibility Rating . . . . . . . . . and Save Money? . . . Some studies have been performed to improve the mixing and working of grease to better simulate machine conditions. . . . . Lithium and lithium complex bases are the most . Copper phthalocyanine grease; Na terephthalamate grease; Thickener Compatibility. . . . . Maximize Fluid Performance . . . . . . . . a Proven Brand of Lubricant . . . . . 2). . . . . . . . About | Select By Need | ACS Program | Tech Talks | Customers | News | Lubricant U | Literature | Sustainability | Careers. . . . . . . . . There are three typical grease thickeners used in grease lubricants, including: There are only a few other thickeners that are not compatible with lithium complex, when using one of the Graco greases. Proper care must be taken to ensure compatibility when changing from one grease system to another, including cleaning if possible, compatibility verification (including base oil), monitoring and assessing, purging and flushing of old grease, and even repurging as necessary. . Mixing different greases, even those with similar thickener types, can lead to ineffective lubrication and result in component damage. . . . . Wide service-temperature range (-45C to 180C; for short periods up to 200C) Suitable for very high rotational speeds (DN value 750,000) Good oxidation . . . . . 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. . For the best experience on our site, be sure to turn on Javascript in your browser. . to Prevent Rancidity of Metalworking Fluids And we can help you meet the latest performance requirements for extreme pressure, wear protection, corrosion inhibition, extended grease life, energy efficiency and the other challenges you face. . . Otherwise, you should be perfectly fine in your application even with some residue. . . . . . . . Grease Compatibility Chart Mixing greases in a system can cause issues with thickener systems reacting with each other. . . Lithium complex is the thickener that is most compatible with other thickeners. . . . . Grease of #2 consistency rated GC (for wheel bearings) and LB (for chassis) is good. . . . . . Thickeners vary depending on application (such as temperature, water resistance etc). . . . . . . . . . . . If research has demonstrated the unreliability of the different grease compatibility charts, it is important to discuss what additional steps can be taken to evaluate grease compatibility. . . . . However, grease technology has changed significantly over the years, and there are many . . . Table 6. . and How Can it Reduce Total Lubricant Costs? This is because the charts from the various manufacturers often disagree with one another on certain thickener-type combinations. . . . . . . . . Lithium and calcium soaps were compatible with one another, and neither was particularly good when mixed with a clay-based grease. . Provide labels and color codes where possible to prevent confusion. . . . . Every thickener gives the grease different characteristic properties and is used according to its advantages. . When the base grease is the same, the name of the grease can be similar, but the two will not be identical; the thickeners can react with each other even if they are made by the same grease manufacturer. . . . . . . Identify the minimum number of products required to meet the design of the equipment in use and consolidate to that number. . 2 is Cenex's Poly-Xtreme, a high-temperature polyurea grease. . . . . 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. . Low noise. . . . . . This could mean that your grease is no longer the correct grade for the machine. . 3.2.4. . . However, this may not be necessary if the two greases in question are compatible with one another. . Fantastic put on and intense stress safety. . . . . Several contradictions were discovered among the various charts. This can change the physical and chemical structure of the grease, causing an inability to hold or release the base oil. . In grease-lubricated applications, on the other hand, it is usually impossible to remove all of the old grease from the application when changing products. . . . . . . . . . . . . . . . . How Do We Choose the Best Cutting Oil? 3.3.2. and the proportions in which they are mixed. The housing of the end bell is removed and replaced by a Plexiglas window to observe the condition of the grease under dynamic conditions. . . . . . . . . . . . The two components of a lubricant are the base oil and additives; a grease adds one more component - the thickener. Grease can also be thickened with non-soap materials. lithium complex. . Conventional Oil Can Add or Subtract From Your Bottom Line For the best experience on our site, be sure to turn on Javascript in your browser. . . When changing to a different oil, it is typically an option to discharge and change fluids completely. . . . . When changing grease thickener types in an application, always consult your lubricant supplier on the compatibility of a proposed product with one that's being replaced. . Compatibility testing is the only way to verify compatibility. . . . . . . . . . . . . This is because the charts from the various manufacturers often disagree with one another on certain thickener-type combinations. . . Avoid This Common Shop Issue . . . . . . In this case, each of the values for the 50-50 mixture is significantly different than the expected numerical average of the unmixed greases. Two greases are considered incompatible when these properties or performance criteria are substantially inferior to both of the unmixed, constituent grease. . . . . . . The mixture's dropping point is not significantly lower than the dropping points of the individual greases. . . . TOYO GREASE recommends that all grease be removed from the application prior to changing greases. . . However, there are three components to any formulated grease: the base oil, the additives and the thickener. . The acid is a fatty, along with, in some cases, a short-chain organic complexing acid. . . . . It is up to you to determine the tradeoffs between grease costs and performance gains/losses. More Than List Price How Evaluating Synthetic vs. . 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. . . . . . . . . . Goodbye, Tramp Oil Tramp Oil Contamination Is Not Inevitable A grease thickener can influence your grease's operating temperature, load, speed, and material compatibility. . . . . The thickener (base), kind'a like a chemical sponge that holds oil in its pores, is the key to waterproofness and compatibility with other thickeners. lithium 12 hydroxy. . . . . . . . . Don't Waylay Your Machine Tools with the Wrong Way Oil . . . . . . 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. . . . . Can a Lubrication Audit Show Us How to . However, these charts rarely tell the whole story, even just in terms of the thickener compatibility. . . . . . . . . . . . Unfortunately, very few charts give any reference for the origin of the data or any research utilized to establish the compatibility relationships described. . Back in the old days, they used simple soaps and clay as the most common thickeners, and compatibility was easy to determine. Good chemical resistance. . . . Common non-soap thickeners include polyurea, organophilic clay, fumed silica, fluoropolymers, and others. . For Commercial Greases . . . . . With Polyurea Greases we are talking about a specific type of thickener for lubricating greases. . One is to determine whether such mixtures meet the same specification requirements as the constituent components. Grease compatibility charts (such as the one pictured below) can only help compare the thickener types of greases. . . . . . (Top) The expected and actual yield stress values for the 50-50 mixture and the reference greases . . . . . . . . . . . Low volatility. 3.3. . . The explanation lies in the fact that with the deterioration of oil and thickener compatibility, the solubility of the latter decreases; the volume fraction of the thickener particles . The maximum usable temperature is 177 C. . . The portion of the grease that determines the compatibility is the thickener. . . Seventeen occurrences would indicate that a grease category was present in each of the charts found, and there were only three such products. . . . . . . Acculube Compatibility Chart . . Polyurea Greases are anorganic, non-soap based thickeners which are alternatives to the commonly known metal- and metalcomplex soap thickeners. . . The thickener defines the type of grease (see Fig. Formulation or additive incompatibility - this is dependent on the robustness of the thickener structure and can occur even when the thickener systems are the same, for example lithium/lithium. Compatibility between greases is based on three factors: thickener type, base oil, and additives. . . . . . . . a grease with different thickener should especially proceed with caution. . A significant portion of grease lubrication failures can be attributed to mixing greases in a system without taking into consideration compatibility. Greases are classified into two major families: soap and non-soap thickeners. . . . . Incompatibility is a major issue when mixing greases something that can result from having too many types of grease in a plant. Most thickeners do not mix together and there are specific greases that are not compatible with others. . . . . . . I'm not sure I would trust data from Grainger. . . . . . . . . . Not all manufacturers agree with the thickener combinations, in the past when manufacturers used clay and soaps as the primary thickeners grease compatibility was more straightforward. . . . . . Grease performance and interactions Grease performance can be affected by interactions between: Thickener: Loss of structural stability. Grease thickeners can be divided into two categories, soap and non-soap. . Kumar . Irritant Contact Dermatitis: How to . . . . . However, these charts rarely tell the whole story, even just in terms of the thickener compatibility. . This type of thickener system can be referred to as a hybrid thickener or in some cases as a complex thickener. . B = Borderline C = Compatible I = Incompatible These factors eventually lead to compromises in machine component life, and substandard equipment performance. A total of 25 different product descriptions were found in the 17 tables. . Thoroughly Clean Those Coolant Systems! . . . . . While the compatibility of oil products is largely related to the base and additives, grease compatibility is connected to the types of thickeners used. Any reputable supplier will have at hand a grease compatibility chart, Hamilton said. . . Grease mixtures can be compatible, incompatible, and borderline compatible. . . Note: This chart is a general guide to grease compatibility. . The areas highlighted in yellow show the contrast between the greases and evidence of mixing. . It is necessary to perform compatibility testing on combinations of these greases to determine whether the greases can be mixed in service. . The change in consistency of the mixture following elevated temperature storage is within the range of the change in consistency of the individual greases following elevated temperature storage. . . . Metal Part Cleaning Basics . . . Taken together, these tests may provide a more comprehensive picture of the potential effects of mixing two grease products together and help users avoid reliability issues from grease mixing, even for products that might otherwise appear to be compatible on charts. . . . polyurea conventiona. . . . . . . . thickener compatibility. Why is Oil Testing Important for New Oil? . . . This can change the physical and chemical structure of the grease, causing an inability to hold or release the base oil. . . . . . . . . . . Note: The compatibility charts should be used as a reference only.Compatibility testing is the only way to verify compatibility. Do not overgrease a system. 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 No. Table 2. . . polyurea. . . If the wrong grease has been inadvertently added to a machine or consolidation is required that will transition the use of a product in a machine, perform simulated mixing and working of the mixtures as well as dynamic properties testing to evaluate the mixtures performance. . Grease compatibility is a straight forward concept when armed with the correct knowledge. . . . . . Electric . . . This includes employees and contractors who may be working in the facility. . . This mixture was chosen for a company looking to consolidate the number of greases in its facility. . . . . + = Compatible = Test required - = Incompatible But thanks to the polyurea thickeners that are far better than any lithium-complex grease. . . Testing two common . . . . These last two parameters include measuring changes in the cone penetration value. Many charts include a disclaimer, usually stating that it would be preferable to clean out all old grease and avoid any mixing, or that the charts are believed to be accurate at the time of publication. . . . Greases are considered to be compatible if the following conditions are met: Problems associated with grease compatibility can be minimized by specifying greases with similar thickening profiles, and by making sure that new greases are appropriate for the operating environment. . . . . . . . Excellent for antifriction bearings, wheel bearings, factory sealed ball bearings, and some flexible couplings. . This kind of lubricant is just perfect for dealing with compatibility. How to Determine Grease Compatibility and Why It's Importantalso provides an indepth look at grease compatibility. Finally, the grease is tested in a controlled stress rheometer to identify changes in flow and shear properties as compared to the original products. . . . . . . Somehow, though, these critical parameters are overlooked when utilizing grease compatibility charts. 5. . . . . . . . . Long bearing life Outstanding thermal and oxidation stability. . . . Different thickener systems can react with each other to modify . . . Deionized Water? 1) SKF high performance, high temperature bearing grease LGHP 2 is not a common polyurea type grease. . . Sometimes, though, conditions dictate a change from one lubricant to another. . In these situations, component damage is likely the result of the chemical or structural interaction between the thickener or additive systems of . Grease Compatibility Matters . . . . . . . . . The conditions observed are noted, and the grease is removed from the bearing. . 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. . Ongoing process maintenance with continuous monitoring by the supplier is also a strategy that will help insure success. . Suitable for long-term lubrication by virtue of low oil evaporation and low tendency towards oxidation. . Compatibility of grease mixtures is typically categorized as follows: Compatible The properties of the mixture are similar to those of the individual grease. . . . . . . . Therefore, it became necessary to verify that one polyurea grease could be added directly to a motor containing the other. . . Borderline The properties of the mixture may or may not be acceptable, depending on the nature of the application. . . . 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.

Caresource Policy Group Number, Brain Hand Coordination Exercises, Metro Diner Aiken Menu, 2d Car Racing Game Opengl Projects With Source Code, Warrenton Airport Events, 4d Global Medical Billing Services Salary, Spirit Rock Retreats 2022,