GL-1 – oil for gearboxes operating at low friction speeds. Solid lubricants are mainly used as additives to oils and greases. Solid lubricants. Classification of Lubricants. Lubricants can also be classified b… 4. semisolid lubricants: greases, generally consists of a soap emulsified with mineral or vegetable oil. Establishes a system of viscosity classification for industrial liquid lubricants and related fluids including mineral oils used as lubricants, hydraulic fluids, electrical oils and for other applications. Properties. : silicones, dibasic acid esters, organic phosphate esters, halogenated hydrocarbons poly alkylene glycols and their derivatives. Classification of Lubricants 3. SJ). Lubricants can be broadly classified, on the basis of their physical state, as follows: (1) Liquid lubricants or lubricating oils; (2) Semi-solid lubricants or greases, and (3) Solid lubricants. Classification of Lubricants Liquid Semi Solid Solid LubricantsLubricants Lubricants Eg.Mineral Oil, Eg. Boron nitride, tungsten disulfide and polytetrafluorethylene (PTFE) are other solid lubricants. Modern lubricants—most often the product of petroleum chemistry— are classified by certain criteria: (1) in terms of physical state, they may be divided into liquid (the most important), plastic, gaseous and solid lubricants. - Motorcycle Engine Oil 1.8. Properties of synthetic lubricants and their uses, Significance of relative viscosity at different temperature. Lubricants are classified in several ways; these could be liquid, semisolid (greases), and solids such as graphite, molybdenum disulfide, boron nitride, tungsten disulfide, and polytetrafluoroethylene. Grease presented by:- Abhishek Raj 17. - Hydraulic Oil 2.2. On viewing under an electron microscope, the surface of even a mirror polished metallic surface exhibits irregularity. Marked with letters GL and a number which indicates the recommended use. Semisolid lubricants. - Industrial Gear Oil 2.4. - Turbine Oil 2.5. Solid lubricants are also used in form of dry powder or as constituents of coatings. Standard ISO 6743-9 “lubricants, industrial oils and related products (class L) — classification — part 9: family X (greases)”, first released in 1987 by the International Organization for Standardization, establishes a detailed classification of greases used for the lubrication of equipment, components of machines, vehicles, etc. How is viscosity rated? Based on its physical states, you can classify lubricants as: Liquid lubricants, which include: Vegetable oil and animal oil. 9. : greases, wax, Vaseline. The classification adopted in the United States and issued by the (American Petroleum Institute), is divided into two groups: "S" for petrol driven engines; "C" for diesel engines. The Society of Automotive Engineers (SAE) developed a scale for both engine (motor oil grades) and transmission oils. - LPG Engine Oil 1.6. 2. solid lubricants: all lubricants in solid form, including powders, coatings and composites (graphite, polytetrafluorethylene, Molybdenum disulfide, etc.) The peaks are called asperities and the valleys are called pits. Liquid lubricants; These are further classified on basis of … 1.1. The classification of the lubricants is they are classified on basis of their physical state as-Solid lubricants; E.g. Lubricants can be classified by their state into following groups: 1. liquid lubricants: all liquid lubricants, including mineral, natural, synthetic oils, emulsions, etc. Molybdenum is used as a paint pigment and as a catalyst. The usual method for kinematic-viscosity determination is that specified in ISO 3104. Oils come in different “weights” (such as 5W … Abstract. to top Solid lubricants LUBRICANTS. 27.2 CLASSIFICATION OF LUBRICANTS. substances which reduce friction and wear between two surfaces (b) Semi-solid lubricants like grease. What are motor oil viscosity ratings? In my previous lecture we understood solid and semi-solid lubricants the merits and demerits. Petroleum Petroleum Oil, Molybdenum jellies Vegetable Oil etc Disulphide etc. Your email address will not be published. Semi-Solid Lubricants: These are neither solid nor liquid. E.g. Group I base oils are classified as less than 90 percent saturates, greater than 0.03 percent sulfur and with a viscosity-index range of 80 to 120. This is a system created and implemented by the Society of Automotive Engineers. This is why they are the cheapest base oils on the market. - Compressor Oil 2.7. Today’s topic is liquid lubricants. Lubricating oils are further classified as follows: i) Animal & Vegetable oils Before the advent (coming or arrival) of the petroleum industry, they were the most commonly used lubricants. The SAE classification of lubricants is the most widely used system for measuring oil viscosity. - Aeromotor Engine Oil 1.5. Graphite and molybdenum disulfide particles are common Solid lubricants. - Diesel-electric locomotive Engine Oil 1.4. Lubricants are largely used for automobiles, heavy industries, industries, and vessels. - Machine Oil 2.3. E.g. Oils are thin liquids made of long polymer chains, with additives for various extra properties. Our more than 600 corporate members, from the largest major oil company to the smallest of independents, come from all segments of the industry. - Diesel Engine Oil 1.2. : fish oils, tallow, lard Additives improve the resistance to oxidation, protection against rust, and the congelation temperature is improved with additives. - Gasoline Engine Oil 1.3. The only particular purpose of that is infiltrating the little cracks between surfaces, adding lubrication and then breaking up rust. Solid Semi-solid Liquid SOLID LUBRICANTS. A Semisolid lubricant is obtained by combining lubricating oil with thickening agent. Mechanism of lubrication. Lubricating oils reduce friction and wear between two moving/sliding metallic surfaces by Blended oil, doped oil, or compound oil. They have good … CLASSIFICATION OF LUBRICANTS ACCORDING TO THEIR PHYSICAL STATE. Synthetic oils these are designed to serve a specific purpose. Graphite, Eg. - 2-cycle Motor Engine Oil 1.9. The latest revision of ISO 6743-6 defines nine categories of enclosed gear lubricants - CKB, CKC, CKD, CKE, CKSMP, (c) Solid lubricants like graphite, mica. The American Petroleum Institute (API) is the only national trade association that represents all aspects of America’s oil and natural gas industry. Blended oil– these are mineral oils mixed with vegetable or animal oils in various additives to improve its lubricating property. General classification of lubricants and this is classifiy in two types Mineral lubricants and Synthetic lubricants. THE British Standard 4231 : 1967 “Viscosity Classification for Industrial Liquid Lubricants” together with BS 4475 : 1969 “Specification for Straight Mineral Lubricating Oils” constitute a real step forward for the lubrication world. E.g. Today, we are going to discuss most popularly classification of lubricant or class of the lubricant which is a liquid lubricant. A good lubricant generally possesses the following characteristics: These letters are followed by second letter that indicates lubricant performance (e.g. Last modified: 2012/06/02 by dmitri_kopeliovich, Classification of lubricants by application, Classification of lubricants by additives, Polytetrafluoroethylene (PTFE) as solid lubricant, http://www.irc.wisc.edu/ASHRAE-TC101/programs/Winter%202001%20Rajewski.pdf, http://www.rps.psu.edu/sep99/flowerpower.html, http://www1.eere.energy.gov/vehiclesandfuels/pdfs/deer_2003/session3/2003_deer_perez.pdf, http://www.hort.purdue.edu/newcrop/proceedings1999/pdf/v4-247.pdf, http://cleanerproduction.curtin.edu.au/resources/training/sme_a3.pdf, http://www.plantsciences.iastate.edu/presentation/biorenew.pdf, Creative Commons Attribution-Noncommercial-Share Alike 3.0 License. Common additives include antioxidants to keep the oil from oxidizing, corrosion inhibitors to prevent parts from corroding, and detergents to keep deposits from forming. Synthetic Lubricants. (2) In terms of chemical composition, several significantly different chemical types of liquid lubricants are used. Modern lubricants—most often the product of petroleum chemistry— are classified by certain criteria: (1) in terms of physical state, they may be divided into liquid (the most important), plastic, gaseous and solid lubricants. Classification. This standard is intended for use by equipment manufacturers in defining and recommending automotive gear, axle, and manual transmission lubricants. Semi-solid lubricants; E.g. Required fields are marked *. Mineral oils (petroleum oils) are products of refining. : olive oil, palm oil, castor oil, cottonseed oil etc Liquid Lubricants Welcome to 17th lecture of video course on tribology. : Teflon, talc, graphite, molybdenum dissuade. Food grade lubricants for packaging machinery that will contain food or beverages must now be produced on machines and equipment that use approved NSF certified lubricants. These are further classified on basis of their origin as 2.1. - CNG Engine Oil 1.7. Classification of Lubricants 2. Animal oil – these are obtained from animals like fishes etc - Automotive Gear Oil 2. :-Silica gel, Grease, Vaseline, etc. The temperature range for these oils is from 32 to 150 degrees F. Group I base oils are solvent-refined, which is a simpler refining process. Rationale: The SAE J306 Standard defines the limits for a classification of automotive gear lubricants in rheological terms. Penetrating lubricants have low viscosity, and these are not a long-lasting one. These long chains are hard to squeeze out from between surfaces, making oils useful as a slippery barrier between them. E.g. The classification of the lubricants is they are classified on basis of their physical state as-, E.g. 1. Mineral oil from petroleum. : Teflon, talc, graphite, molybdenum dissuade. - Automatic Transmission Oil 1.10. Save my name, email, and website in this browser for the next time I comment. Liquid lubricants are used in medicines. 27.2.1 Lubricating oils. (2) In terms of chemical composition, several significantly different chemical types of liquid lubricants are used. Essentially, ISO 6743-6 serves as the classification system and ISO 12925-1 defines what those classifications are in terms of testing. Mineral oil – these are obtained from petroleum oils containing mostly of hydrocarbons Solid lubricants e.g., graphite, are in the form of powders and can be applied on machine surfaces where they orient themselves parallel to the surface. Classification of lubricants by application Engine oils Gear oils Hydraulic oils Cutting fluids (coolants) Way lubricants Compressor oils Quenching and heat transfer oils Rust protection oils Transformer oils (insulating oils) Turbine oils Chain lubricants Wire rope lubricants Classification of lubricants by additives (a) Liquid Lubricants like mobile oil, gear oil, etc. - Circulating Oil 2.6. : paraffin base oils and naphthalene base oils ISO 3448 is used as the viscosity classification system. Synthetic lubricants are used in turbines, vacuum pumps, and semiconductor devices. 3. gaseous lubricants: typically its air, but can be any other gas. Vegetable oil – these are obtained from plants. Classification of API lubricants for gearboxes and main drives. Your email address will not be published. Lubricants are also used as cutting fluids in many industries. As like as oil and grease, there are many types of penetrating lubricants. 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