types of lubricants and their uses pdf

Types Of Lubricants And Their Uses Pdf

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On Wednesday, May 5, 2021 12:39:34 PM

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Solids such as soapstone—which is itself a lubricant—were extensively employed, but many other strange bodies were at times included; cork dust, manila pulp, naphthaline and caoutchouc all figure in the old recipes. Report bugs here. Please share your general feedback.

Common Grease Types and Characteristics

Technical Editor at Maker Media. Sometimes Scientist. Builder of things. Maker of stuff. 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. Read articles from the magazine right here on Make:. Get one today. 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. The more water that absorbs into the oil, the lower its adhesion will be, causing it to wash off of the very parts that need lubrication.

Greases are made by using oil typically mineral oil and mixing it with thickeners such as lithium-based soaps. They may also contain additional lubricating particles, such as graphite, molybdenum disulfide, or polytetrafluoroethylene PTFE, aka teflon.

Greases combine the lubricating properties of oils with added stickiness, allowing the lubricant to adhere to the surfaces better. Greases can even act as a barrier, protecting the surfaces from contaminants that can corrode or damage them.

Like oils, greases come in a range of consistencies, from ketchup-thin to thick like cheddar cheese. When parts move, they can fling grease all around, so it may not be the best option for keeping things clean.

Any shade-tree mechanic would agree that these types of lubricants deserve their own special section. Penetrating lubricants are the saviors of many stuck-bolt combatants, loosening years of rust and debris in minutes. Contrary to the other substances covered here, penetrating oils are not designed for long-lasting lubrication.

Instead, they are low-viscosity oils with additives that are specifically designed for one purpose: to infiltrate the tiny cracks between surfaces such as screw threads , add lubrication, and break up rust. There are a lot of different penetrating oils out there, but did you know that you can make your own low-cost penetrating oil that outperforms almost all of them? In an experiment conducted by Drexel University engineering students, they found that a mixture of vegetable oil and acetone works as well or better than WD at loosening stuck bolts.

Be careful when mixing, as acetone is flammable, and will melt many plastic containers. If possible, use a glass or metal container to mix it, or buy an oil can to make things even easier. Also, be sure to shake the mixture before each use, as acetone and vegetable oil tend to separate over time.

Using the right lubricant the first time will ensure that the problem is solved long enough for you to forget all about it. Save the WD for what it does best: light lubrication, cleaning, and freeing stuck-together Lego bricks. Dry lubricants are made up of lubricating particles such as graphite, molybdenum disulfide, silicone, or PTFE. At the molecular level, these particles are super slippery, so they reduce the friction between surfaces in contact with one another.

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LUBRICANT SPECIFICATIONS: PART FIVE—GREASE

By VibrAlign Author on July 13, Although lubrication is a relatively easy task to perform, it is still instrumental to have a good understanding of the different types of lubricants. Doing so will ensure that the wrong type is never used for the wrong application. This will inevitably prevent machine downtime and failure. Oil is one of the most common lubricants found in plants. At times, additives can be mixed with the oil to prevent oxidizing and corrosion.

Lubrication in Practice pp Cite as. This chapter outlines the main types of lubricants and covers some of the more important lubricant properties and tests, finishing with engine tests. With each test description there is a note on any relevant additives or classification systems. Unable to display preview. Download preview PDF. Skip to main content.

4 Types of Lubricants and How to Use Them

A lubricant is a substance, usually organic , introduced to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move. It may also have the function of transmitting forces, transporting foreign particles, or heating or cooling the surfaces. The property of reducing friction is known as lubricity.

Lubrication is the control of friction and wear by the introduction of a friction-reducing film between moving surfaces in contact. The lubricant used can be a fluid, solid, or plastic substance. Although this is a valid definition, it fails to realize all that lubrication actually achieves. Many different substances can be used to lubricate a surface. Oil and grease are the most common.

Technical Editor at Maker Media. Sometimes Scientist. Builder of things. Maker of stuff. Is your robot grinding to a halt?

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Types and Properties of Lubricants
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4 Comments

  1. Nadina H.

    A series of articles dealing, in as simple a way as possible, with the basic facts of lubrication, lubricants, their selection and prescription, specification, application, and testing.

    10.05.2021 at 04:07 Reply
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