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Lubrication 3,288 Items
Description: Lubrication is the control of friction and wearing of moving parts by introducing friction-reducing medium between two moving surfaces. The friction-reducing agent (lubricant) can be a solid, plastic, or fluid substance. The commonest types of lubricants are grease and oil. Grease is made from oil and a thickening agent. The thickening agent helps to lubricate the surface while oil acts as the lubricant. The oil used in greases can be mineral based, vegetable, synthetic or a combination. The targeted application determines the type of oil (base oil) that should be used. In cases where there are concerns for the environment, it is advisable to use vegetable oils. There are three main types of lubrication; full-film, boundary, and mixed lubrication. Full film lubrication can be broken down into two sub-categories; hydrodynamic and elastohydrodynamic. The hydrodynamic lubrication happens when two surfaces are fully separated using a film of fluid. Then, elastohydrodynamic is similar to the hydrodynamic but differs in that the lubricant layer is thinner. The boundary lubrication is used where there are regular device/ machine starts and stops. The best lubricants to use in this case are oils with anti-wear additives to help protect the surfaces. The additives cling to the surfaces and create a type of sacrificial layer that helps to The mixed lubrication is a hybrid of hydrodynamic lubrication and boundary lubrication. Though the bulk of the surfaces in this lubrication type is separated by a layer of lub, the asperities still get into contact. This is why the additives are required. It is important to understand your device or the moving part and use the right lubrication. When used appropriately, lubrication can help to achieve the following: 1. Reducing friction 2. Preventing/ slowing wear 3. Protecting equipment from corrosion 4. Controlling contamination 5. Controlling temperatures 6. Transmitting power