Types Of Grease And Uses Pdf

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types of grease and uses pdf

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Chemistry and Technology of Lubricants pp Cite as. Lubricating grease has been regarded by many prominent members of the oil industry, including the National Lubricating Grease Institute NLGI , as more of an art than a science. One of the primary objectives of a new generation of lubrication engineers is to radically change this concept and start speaking the same language as other scientists.

4 Types of Lubricants and How to Use Them

Is your robot grinding to a halt? In general, the most common application of a lubricant is to reduce friction between surfaces, but not all lubricants are equal. Oils are thin liquids made of long polymer chains, with additives for various extra properties. Common additives include antioxidants to keep the oil from oxidizing, corrosion inhibitors to prevent parts from corroding, and detergents to keep deposits from forming. These long chains are hard to squeeze out from between surfaces, making oils useful as a slippery barrier between them. The lower the number, the thinner the oil, and the more easily it will flow. While oil can help make things water resistant, it can also absorb water over time.

Frequently used in lubricating food machinery. Bentonite clay is treated with a polar activator that will give an electrical charge to the clay particles, thus aligning them to hold the lubricating oil in suspension in a non-soap thickened, grease structure. Not very compatible with other greases, since the electrical charge may be destroyed and soften the grease beyond performance limits. This type of product is often called a No-Melt grease. Has good water resistance, low temperature pumpability and extremely high temperature applications where a non-melting grease is required, the clay structure can aid in setting up a self-forming oil seal where bearing seals are impossible to maintain such as in wheel bearings on high temperature kiln cars.

Screen Reader Access Color Themes. Directors Familiarisation program for Ind. These greases have excellent water resistance properties, high oxidation stability, and maximum structural stability with superior anti-rust and anti-corrosion properties. These greases resist water washout and enjoy all round acceptance for both anti-friction and plain bearing lubrication. These greases are widely used in steel plants, heavy engineering units, textile mills, petrochemical and chemical units. These greases prevent welding and seizure of moving parts often caused by shock loading and resist water washout. These greases meet IPSS specification and are recommended for both plain and anti-friction bearing in a wide variety of application such as automotive, earth moving equipment and general industrial machinery.

AUTOMOTIVE GREASES

You might be using a high-quality grease. You may have put a lot of effort and money into selecting the best quality grease in the pursuit of lubrication excellence. Considering this lubricating oil analogy, the best quality turbine oil would most likely not make a good engine oil. Most users are aware of the importance of selecting the right lubricant for a given application. OEM specifications for a lubricating oil normally include viscosity at operating or ambient temperature, additive requirements, base oil type and even special considerations for different environmental conditions. Grease specifications, on the other hand, often lack the detail necessary to make a proper selection, leaving it up to the lubrication engineer to create the specification. Using this information alone, one could select the right consistency and thickener type.

Grease is a solid or semisolid lubricant formed as a dispersion of thickening agents in a liquid lubricant. Grease generally consists of a soap emulsified with mineral or vegetable oil. 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. This change in viscosity is called shear thinning. 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.

Lubricant and Lubricant Additives

The poorly shod children of the proverbial cobbler have passed into legend and their state is presumed to illustrate a general tendency. This is possibly not merely that of neglect in applying a certain special skill or craft in the domestic sphere, but also alludes to the absence, in the particular domicile, of the type of product which the head of the household helps to manufacture during his working day. Report bugs here. Please share your general feedback.

We will now consider the lubricant itself. Report bugs here. Please share your general feedback. You can join in the discussion by joining the community or logging in here. You can also find out more about Emerald Engage.

Lubricants have been used by humans for thousands of years in their simple machines such as wheel-axle bearings and sledges. Modern machines are much more complicated and are composed of many different machine elements which are in relative motion under varying loads, speeds and temperatures. Industrial lubricants are significant for all kinds of industries whether machine building, chemical, textile, wood, food-processing, automotive, or wind power.

Base Oil Viscosity

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Industrial Greases

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