TAILIEUCHUNG - lubricants and hydraulic fluids Episode 2 Episode 9

Tham khảo tài liệu 'lubricants and hydraulic fluids episode 2 episode 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | EM 1110-2-1424 28 Feb 99 The first three classes are discussed throughout this manual and require no further explanation they contain the indicated additives. Compounded oil contains from 3 to 10 percent fatty or synthetic fatty oils. It is also called steam cylinder oil. The added fat reduces the coefficient of friction in situations where an extreme amount of sliding friction occurs. A very common application is in worm gear systems. Compounded oil may be composed of either a normal mineral oil or a residual oil depending on the desired viscosity. b Residual compounds are heavy-grade straight mineral oils or EP oils. These compounds are normally mixed with a diluent to increase ease of application. After application the diluent evaporates leaving a heavy adhesive lubricant coating. Residuals are often used for open-gear applications where tackiness is required to increase adhesion. This type of heavy oil should not be confused with grease. Residual oil with lower viscosity is also used in many closed-gear systems. Compounded oil may contain residual oil if the desired viscosity is high. 3 Classification according to use. This system of classification arises because refining additives and type of petroleum paraffinic or naphthenic may be varied to provide desirable qualities for a given application. Some of the more common uses are Compressor oils air refrigerant . Engine oils automotive aircraft marine commercial . Quench oils used in metal working . Cutting oils coolants for metal cutting . Turbine oils. Gear oils. Insulating oils transformers and circuit breakers . Way oils. Wire rope lubricants. Chain lubricants. Hydraulic oils. 4 Nonspecialized industrial oil. This classification includes oils that are not formulated for a specific application and are frequently referred to as general purpose oil in the manufacturer s product literature. These oils are generally divided into two categories general purpose and EP gear oils. a General purpose oils. General .

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