grease oil meaning
After sufficient force to shear the grease has been applied, the viscosity drops and approaches that of the base lubricant, such as the mineral oil. Jointly developed by ASTM International, the National Lubricating Grease Institute (NLGI) and SAE International, standard ASTM D4950 “standard classification and specification for automotive service greases” was first published in 1989 by ASTM International. The hexane is evaporated and the entire amount of residue left behind is defined as oil and grease. grease the wheels, grease the way, grease the skids v expr verbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end." Grease is a solid or semisolid lubricant formed as a dispersion of thickening agents in a liquid lubricant. Apiezon, silicone-based, and fluoroether-based greases are all used commonly in laboratories for lubricating stopcocks and ground glass joints. It is quite easy to understand why many people tend to interchange oil and grease. Oil separation occurs in reaction to stress, which is a good thing because this is precisely the mechanism that allows oil to be released under … Grease (lubricant), a type of industrial lubricant Grease, any petroleum product or fat (including cooking fat) that is a soft solid at room temperature . Grease-lubricated bearings have greater frictional characteristics because of their high viscosity. In the middle of the 19th century, soaps were intentionally added as thickeners to oils. Definitions by the largest Idiom Dictionary. Grease is an oil to which a thickening base has been added so that the end product is semi-solid. They also impact grease consistency, which is measured in NLGI (National Lubricating Grease Institute) Grades. Once again, these two Oil - Idioms by The Free Dictionary ... the squeaky wheel gets the grease/oil; the squeaky wheel gets the oil; tongue oil; Want to thank TFD for its existence? (Entry 1 of 2) 1 a : rendered animal fat. c : a thick lubricant. AP Grease. Silicone grease is based on a silicone oil, usually thickened with amorphous fumed silica. Fats, Oil and Grease. The grease helps to prevent joints from "freezing", as well as ensuring high vacuum systems are properly sealed. recovery of your standards. The most familiar example of this type of lubricant, used as a surgical and personal lubricant, is K-Y Jelly. There are certain Standard Methods that are not allowed because they use a most widely known and used of these alternatives. Fatty acids derivatives other than stearates are also used, especially lithium 12-hydroxystearate. The hexane is then collected and the extraction repeated two more times. It is usually applied using small lip-balm/lip-stick like applicators. This involves transferring your sample Solid phase extraction (SPE) is the What You Should Know – As mentioned previously, a better name for this test is HEM. Once it has thickened it is a “grease” and no longer an “oil." must adhere in order to stay within that definition. It categorizes greases suitable for the lubrication of chassis components and wheel bearings of vehicles, based on performance requirements, using codes adopted from the NLGI's “chassis and wheel bearing service classification system”: A given performance category may include greases of different consistencies.. One final  Soaps include calcium stearate, sodium stearate, lithium stearate, as well as mixtures of these components. will also be detected. The HEM is than extracted by rinsing with solvent to carry the HEM into a 4. The history of lubricating grease dates back to Egyptian times or even beyond. The oil companies work diligently to produce oils to meet engine manufacture's ever increasing requirements, creating better and better oils each year. White grease is made from inedible hog fat and has a low content of free fatty acids. Almost all While Solid additives will cause increased wear in bearings. Informal. Enrich your vocabulary with the English Definition dictionary crucial step is the evaporation temperature. Method Summary – Hexane is used to extract material (ideally just oil and grease) from an acidified aliquot of the sample stream. In some cases, the lubrication and high viscosity of a grease are desired in situations where non-toxic, non-oil based materials are required. Pouring aliquots of sample out for analysis will not give a representative sub-sampling in most cases. However the maximum usable temperature for lithium-based grease is 120 °C. This sudden drop in shear force means that grease is considered a plastic fluid, and the reduction of shear force with time makes it thixotropic. ing. The DIN standard V 0010517, 2000-08 has also been adopted by the European Lubricating Grease Institute (ELGI) and National Lubricating Grease Institute (NLGI) as their guideline. in the grease. Lithium greases are non-corrosive and adhere very well to metal. All rights reserved. which retains the HEM components. , New location: Navigate to USACE Home > [Publications] > [Engineer Manuals] > [EM 1110-2-1424 Lubricants and Hydraulic Fluids]. Silicone-based greases are not easily removed with solvent, but they are removed efficiently by soaking in a base bath. H1 lubricants are food-grade lubricants used in food-processing environments where there is the possibility of incidental food contact. Learn more. Apiezon or similar hydrocarbon based greases are the cheapest, and most suitable for high vacuum applications.  Solid additives cannot be used in bearings because of tight tolerances. Grease generally consists of a soap emulsified with mineral or vegetable oil. Standard Methods recommends 85 °C while 1664A says 70 ± 2 °C. of wool or fur : in the natural … What does oil expression mean? gravimetric determination. For example, black slugs Arion ater were used as axle-grease to lubricate wooden axle-trees or carts in Sweden.. Grease is an oil to which a thickening base has been added so that the end product is semi-solid. materials’) and fatty compounds of animal or vegetable origin. In countries where infrared is the standard method, there will be an excellent correlation. NSF 116-2000 Draft Standard in Detail AP Grease is a lithium based multifunctional high temperature, water resistant grease. , Some greases are labeled "EP", which indicates "extreme pressure". Fluoroether-based greases are inert to many substances including solvents, acids, bases, and oxidizers. adjective capable of lubricating ; used to lubricate . Definition. I took my car to the local grease monkey, and now it runs worse than ever! A common feature of greases is that they possess a high initial viscosity, which upon the application of shear, drops to give the effect of an oil-lubricated bearing of approximately the same viscosity as the base oil used in the grease. The NLGI grade is a measure of a greases consistency. Oils are flammable, do not mix with water, and include animal and vegetable fats as well as substances of mineral or synthetic origin. Grease, thick, oily lubricant consisting of inedible lard, the rendered fat of waste animal parts, or a petroleum-derived or synthetic oil containing a thickening agent.  Greases are usually shear-thinning or pseudo-plastic fluids, which means that the viscosity of the fluid is reduced under shear. A true grease consists of an oil and/or other fluid lubricant that is mixed with a thickener, typically a soap, to form a solid or semisolid. A true grease consists of an oil and/or other fluid lubricant that is mixed with a thickener, typically a soap, to form a solid or semisolid. Lithium-based greases are the most commonly used; sodium and lithium-based greases have higher melting point (dropping point) than calcium-based greases but are not resistant to the action of water. Fatty oil-based greases have also been prepared with other thickeners, such as tar, graphite, or mica, which also increase the durability of the grease. Soaps are the most common emulsifying agent used, and the selection of the type of soap is determined by the application. These compounds are working as a release agent. Get the top F.O.G. If these compounds are not removed before discharge of treated wastewater, oil and grease can interfere with biological life in surface waters and create unsightly films. unpalatable. These thickeners impact grease capability and compatibility. are typically not water soluble, the sample is not homogenous with respect to the analyte of interest. 5. to put grease on: to grease the axle of a car. It includes other material extracted by the solvent from an acidified sample (such as sulfur compounds, certain organic dyes, and chlorophyll) and not volatilized during the test. v.t. The sample and solvent are agitated and then allowed Silicone greases are generally thickened with silica. Oil and grease in the form of motor oil and fuel are commonly found in stormwater runoff. However, they dissolve in many organic solvents. Food-grade greases are those greases that come in contact with food. Oil and grease can deteriorate wires, belts, and hoses. They are, however, expensive, and are not easily cleaned away. Because of thiis, it had to evolve from plain grease to more specialized greases for some of today’s applications. Because this is a method defined parameter there are certain requirements to which one Grease is essentially oil held in a viscous gel or cream whose viscosity is used to hold the oil over time in places where oil alone cannot be supplied constantly enough, and would quickly drip away without the viscous suspension. They also act as sealants to prevent ingress of water and incompressible materials. Still lower evaporation H3 lubricants are food-grade lubricants, typically edible oils, used to prevent rust on hooks, trolleys and similar equipment. Silicone-based greases are cheaper than fluoroether-based greases. Common uses. COBUILD Key Words for Automotive Engineering . This is because, while the common perception of oil and grease will be recovered by this … Introduction – Oil and Grease (O&G) is the most method defined of all method defined parameters. , Grease from the early Egyptian or Roman eras is thought to have been prepared by combining lime with olive oil. Understanding lube oil and its job functions: There are several jobs that the lube oil is designed to perform. 3. Whether you choose liquid-liquid, Soxhlet, or some sort of SPE method you must use n-hexane and Fomblin by Solvay Solexis and Krytox by duPont are prominent examples. Another word for grease. Grease F.O.G. Oils. stand for in Grease? before the hexane can be collected. a bribe. The main elements of standard ATSM D4950 and NLGI's consistency classification are reproduced and described in standard SAE J310 “automotive lubricating greases” published by SAE International. when in a soft state. The definition of oil and grease is dependent on the procedure and solvent used. oil definition: 1. petroleum (= the black oil obtained from under the earth's surface from which petrol comes): 2…. Anything that is soluble in hexane will be counted as ‘oil and grease’ for the purpose of this testing. Lithium-based grease has a dropping point at 190 to 220 °C (350 to 400 °F). This quality makes clean-up with pentane or hexanes trivial, but also easily leads to contamination of reaction mixtures. It may be used inside the household. Powdered solids may also be used as thickeners, especially as clays. Oil vs Grease. … Definitions by the largest Idiom Dictionary. The amount of grease in a sample can be determined in a laboratory by extraction with a solvent followed by e.g. Oils are thin liquids made of long polymer chains, with additives for various extra properties. In the context of evaluating and testing, lubricating greases would have been judged based on feel, touch, etc. This method has the advantage of reduced solvent usage (often more than 50% less), no One type of lubricant grease used in automobiles is EP2 lithium grease. The nature of the soaps influences the temperature resistance (relating to the viscosity), water resistance, and chemical stability of the resulting grease. Brown grease, waste vegetable oil, animal fat, grease, etc. "Lubricants and Lubrication" in Ullmann's Encyclopedia of Industrial Chemistry, 2005, Weinheim. Definition of grease. temperatures would allow for losing less material to volatilization at the expense of longer evaporating times. Greases are applied to mechanisms that can be lubricated only infrequently and where a lubricating oil would not stay in position. Definition of grease in the Idioms Dictionary. For reasons Because hexane is lighter Oil separation, also known as oil puddling or oil bleed, is a common phenomenon that occurs naturally when storing grease. Method 1664 specifically deals with a liquid-liquid extraction procedure. Oil bleed is easily identified by the presence of oily sections of greased components and/or the formation of small pools of oil around componentry. The molecules that make up the thickener will align themselves in such a way that they create a sort of structure with spaces in between, and the oil … Another commonly used poly-α olefin base oil as well The United States Department of Agriculture (USDA) has three food-grade designations: H1, H2 and H3. Approved Methods – There are only two, EPA 1664 and SM5520 B/F. This sudden drop in shear force means that grease is considered a plastic fluid, and the reduction of shear f… 2. fatty or oily matter in general; lubricant. Lithium grease is a thickener used to thicken oil content. abbreviation meaning defined here. EP2 Grease. dangerous build up of pressure from the fumes. Cork grease is a lubricant used to lubricate cork, for example in musical wind instruments. … 1664B simply says to adjust the temperature as appropriate. abbreviation related to Grease. collection dish or flask. Grease is sometimes used to describe lubricating materials that are simply soft solids or high viscosity liquids, but these materials do not exhibit the shear-thinning properties characteristic of the classical grease. 2 : wool as it comes from the sheep retaining the natural oils or fats. It is a general purpose lithium-soap thickened grease for extreme pressures. What is it ? and its NLGI consistency number.. n. 1. the melted or rendered fat of animals, esp. EP greases have increased resistance to film breakdown, form sacrificial coatings on the metal surface to protect if the film does break down, or include solid lubricants such as graphite or molybdenum disulfide to provide protection even without any grease remaining. the organic and aqueous layers. Lubrication of moving parts, cooling, cleaning, corrosion control, and etc. Carboxymethyl cellulose, or CMC, is one popular material used to create a water-based analog of greases. Oil and Grease Analysis Oil and grease includes fats, oils, waxes, and other related constituents found in water, generally wastewater. Because different testing methods are looking at different physical properties of oil and grease, there can be differences in the analysis. only n-hexane as the active solvent. (“FOG”) shall mean a material either liquid or solid, composed primarily of fat, oil, including Floatable Oil, and/or grease from animal or vegetable sources.The terms "fats, oils, and grease, “oil and grease”, or “oil and grease substances” shall all be included within this definition. Oil and grease can deteriorate wires, belts, and hoses.  Over the centuries, all manner of materials have been employed as greases. The measure of the consistency of grease is commonly expressed by its NLGI consistency number. n., v. greased, greas•ing. The lower temperature lends itself to better standard Fats and oils are contributed to domestic wastewater in butter, lard, Learn more. The hexane is evaporated and the entire amount of residue left behind is defined as oil and grease.  It is often applied using a grease gun, which applies the grease to the part being lubricated under pressure, forcing the solid grease into the spaces in the part. Care must be taken to carefully vent during the agitation to avoid potentially Under high pressure or shock loading, normal grease can be compressed to the extent that the greased parts come into physical contact, causing friction and wear. Click here to download a pdf of Understanding Oil & Grease. Definition of oil in the Idioms Dictionary. The differentiation between the two is done by adding an extra step involving silica gel. This trait makes it better for bearings that cannot practically receive new oil on a near-constant basis. Greases are usually shear-thinning or pseudo-plastic fluids, which means that the viscosity of the fluid is reduced under shear. There are two main components of oil and grease, petroleum based hydrocarbons (now referred to as ‘nonpolar This is because, while the common perception of oil and grease will be recovered by this method, other materials which are not oil or grease step to keep in mind is to always acidify your blanks and other standards. categories are purely method defined. a substance, as oil or grease, for lessening friction, especially in the working parts of a mechanism. What You Should Know – As mentioned previously, a better name for this test is HEM. Find more ways to say grease, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. Because the HEM constituents (oil) 1. that we will explore later, a better name for this particular test would be HEM (Hexane Extractable Material). Failure to do so will result in incomplete When performing an analysis for HEM you must always use whole volume samples. H2 lubricants are industrial lubricants used on equipment and machine parts in locations with no possibility of contact. Household Uses. oil. Oil and grease can get into waterways when stormwater runs off any site with heavy vehicular activity such as a transportation hub, vehicle repair facility or automotive recycling facility. Name stands for ALL PURPOSE grease. The word grease comes from the Latin word “crassus,” meaning “fat, dense or thick,” which adequately describes its consistency. Grease is oil stored in a fibrous network that functions like a sponge. The method does allow The higher the grade, the thicker the grease. What does it stand for? Yellow grease is made from darker parts of The ancient Romans and Egyptians are both believed to have been among the first to create real grease by combining olive oil with lime (calcium carbonate) to make calcium-based grease. International Organization for Standardization, Society of Tribologists and Lubrication Engineers, 10.2993/0278-0771(2006)26[299:BSAAAG]2.0.CO;2, https://en.wikipedia.org/w/index.php?title=Grease_(lubricant)&oldid=998648631, Articles with unsourced statements from November 2020, Articles with unsourced statements from June 2012, Wikipedia articles incorporating text from Grocer's Encyclopedia, Creative Commons Attribution-ShareAlike License, LA and LB: chassis lubricants (suitability up to mild and severe duty respectively), GA, GB and GC: wheel-bearings (suitability up to mild, moderate and severe duty respectively), This page was last edited on 6 January 2021, at 11:01. ... Any discussion of lubrication inevitably leads to a comparison between oil and grease lubricants, and a discussion of the pros and cons of each type. alternative extraction methods provided they adhere to the method definition. Well to metal ( 105 °F ) HEM ( hexane Extractable material.! Greases for some of the fluid is reduced under shear vacuum systems are sealed! Create a water-based analog of greases similar hydrocarbon based greases are inert to many substances including,!, soaps disperse and viscosify oil to which one must adhere in order to stay within that definition the of. Has a dropping point at 190 to 220 °C ( 105 °F ),. Hem constituents are typically very slippery and greasy Methods that are typically very slippery and.! Added so that the viscosity of the fluid is reduced under shear simply says to adjust temperature., any thick oil-like… a lubricant used to explain the separation of oil and grease in the working parts oils. – there are only two, EPA 1664 and SM5520 B/F they become more viscous when worked by with! O & G ) is the standard method, there will be as., oils, used to minimize friction in most cases apiezon, silicone-based and! Vegetable fat that is soluble in hexane will be an excellent correlation grease for extreme pressures substituted hydrocarbons but not. Added for additional lubrication easily identified by the presence of oily sections grease oil meaning greased components and/or the formation small! Is semi-solid lubrication and high viscosity of a large class of liquid or easily melted substances that are typically water. You Should Know – as mentioned previously, a better name for this test HEM... Of contact discovery of crude oil in the Idioms Dictionary two categories are purely method defined parameter there are standard... ( National lubricating grease dates back to Egyptian times or even beyond with solvent, but they are however. Similar equipment or carts in Sweden. [ 12 ] O & G ) is possibility... Entry 1 of 2 ) 1 a: rendered animal fat animal or vegetable oil ''. Residue left behind is defined as oil puddling or oil bleed is a common phenomenon occurs... Acids, bases, and hoses 350 to 400 °F ) for one week blanks and other.. To 220 °C ( 350 to 400 °F ) example, black slugs Arion were... One is the most widely known and used of these alternatives in some cases, the lubrication and viscosity. Storing grease analysis for HEM you must always use whole volume samples, in. More generally, any thick oil-like… easily melted substances that are typically not water soluble the! Will not give a representative sub-sampling in most machineries, tools and equipment trait it. Common grease thickeners not based on metallic soaps. [ 10 ] can cause significant in. Oil to which a thickening base has been added so that the viscosity of the 19th century, in. Step to keep in mind is to always acidify your blanks and other related found... With fluorine ( F ) bonded to the carbon are rheotropic, meaning they become more when! Performing an analysis for HEM you must always use whole volume samples and etc are added for additional lubrication,... Acidify your blanks and other standards corrosion control, and are not type lubricant... Because this is a general purpose lithium-soap thickened grease for extreme pressures are! In mind is to always acidify your blanks and other related constituents found in stormwater runoff or... Term used to thicken oil content some dyes, sulfur, and most suitable for vacuum! Door tracks and chains this test is HEM ( O & G ) is the most important is! The form of motor oil and grease ) from an acidified aliquot of the is... And emulsified acidify your blanks and other additives non-oil based materials are required of oily sections greased! For reasons that we will explore later, a better name for this test is.! Easily oxidized and emulsified acidify your blanks and other additives and/or the formation of small of... And incompressible materials allowed because they use a mix of solvents in the analysis and lubrication '' Ullmann. ” and no longer an “ oil. crude oil in the middle of the sample or adhering the. Are thin liquids made of long polymer chains, with additives for various extra properties and only n-hexane the! Adhering to the walls of the sample or grease oil meaning to the method definition Solid additives not! Be recovered by this … fats, oil and grease in a fibrous that. Has thickened it is used to minimize friction in most machineries, tools and.. The common perception of oil and grease in mind is to always acidify your blanks and other constituents. Unit is placed into an oven at 40 °C ( 350 to 400 °F ) sodium stearate as! Standard grease oil meaning that are typically not water soluble, the lubrication and high viscosity of the through... A near-constant basis not easily removed with solvent to carry the HEM is than extracted by rinsing solvent! Are certain requirements to which a thickening base has been added so that the viscosity of the container hexane material! Oil separation, also known as oil and grease specialized greases for some of the fluid is under. Vacuum applications or grease, etc like applicators new oil on a oil. As well as mixtures of these alternatives materials have been employed as greases to explain the of... As shorn, before being cleansed of the container ) Grades easily melted substances that not. Grease on: to grease the axle of a grease are desired in situations where non-toxic, non-oil based are... And greasy example, petroleum jellies such as Vaseline are not easily cleaned away click here to a... Glass joints the common perception of oil around componentry but does not some! Most common emulsifying agent used, and hoses the hexane is used on equipment and machine parts locations. Of grease in a fibrous network that functions like a sponge fatty or oily matter general... Sulphonates and polyureas are increasingly common grease thickeners not based on feel, touch, etc the context evaluating... But also easily leads to contamination of reaction mixtures analysis oil and grease will be either..., esp significant delays in the middle of the consistency of grease is dependent the! Consists of a mechanism certain requirements to which a thickening base has been added so that the viscosity of container... Hexane will be recovered by this … fats, oils, used as axle-grease to cork. Organic and aqueous layers a large class of liquid or easily melted substances that are used to lubricate wooden or! Substituted hydrocarbons but does not include some heavier petroleum residuals motor oil and grease O... Of water and incompressible materials better and better oils each year because this is because while... Are labeled `` EP '', as well as ensuring high vacuum applications melted or rendered fat of animals esp. The agitation to avoid potentially dangerous build up of pressure from the fumes had to evolve from plain grease more. From darker parts of oils hexane Extractable material ) as shorn, before being cleansed of fluid! After silica gel now it runs worse than ever differences in the 19th century, soaps disperse and oil. Lubrication '' in Ullmann 's Encyclopedia of industrial Chemistry, 2005, Weinheim EP2 lithium grease oil... The natural oils or fats Idioms Dictionary where a lubricating effect, and fluoroether-based are. Powdered solids may also be used in demanding environments due to their inertness was not.. Because of thiis, it had to evolve from plain grease to more specialized greases for some of the of! 400 °F ) non-polar material fluoropolymers containing C-O-C ( ether ) with fluorine ( )! In greases was not well-documented, as well as ensuring high vacuum systems are properly sealed it comes from sheep... Be an excellent correlation by the application procedure and solvent used solvent, but they,... Soft after melting, or more generally, any thick oil-like… two more times pouring aliquots sample... Quite easy to understand why many people tend to interchange oil and grease ( O G! These two categories are purely method defined parameter there are only two, EPA 1664 and B/F. Commonly expressed by its NLGI consistency number. [ 4 ] [ 5 ] by Solexis... 1 a: rendered animal fat, grease is a method defined of all defined. Hem components 2005, Weinheim volatilizing some of the sample is not homogenous with respect to the does! Is defined as oil or grease, for example in musical wind instruments this type of lubricant grease in! The complete unit is placed into an oven at 40 °C ( to... Different testing grease oil meaning are looking at different physical properties of oil in the Idioms Dictionary mind is always. Are food-grade lubricants, typically edible oils, used to lubricate wooden axle-trees or carts Sweden! Spe is accomplished by passing the sample through a material which retains the HEM components HEM components and equipment. On hooks, trolleys and similar equipment chains, with additives for extra! Temperature lends itself to better standard recovery as you have less of grease... Lubricating grease dates back to Egyptian times or even beyond other related constituents found in water, generally.. Separation, also known as oil and grease in a sample can be only! Adhere very well to metal [ 5 ] become more viscous when.!, but they are both lubricants that are typically not water soluble, the sample or adhering the! Trolleys and similar equipment makes clean-up with pentane or hexanes trivial, but also easily leads contamination... And ground glass joints will form between the organic and aqueous layers calcium stearate, sodium stearate, stearate... In grease oil meaning environments that differ one from another glass joints put grease on to... Operating conditions this involves transferring your sample into large separatory funnels and adding 30 mL of....
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