IntroductionTraditionally the high temperature in the cutting zone is controlled using cutting fluid. Cutting fluid helps improve surface finish and facilitate chip washing. It simultaneously performs the function of refrigerant and lubricant. The cooling effect reduces the temperature in the cutting zone and the lubrication action decreases the cutting forces. In this way the friction coefficient between tool and chip decreases compared to dry machining. Minimizing the friction between the tool cutting edge and the workpiece, corrosion control, chip ejection and washing are the functions of cutting fluid in machining. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an Original Essay The beginning of metal cutting can be traced back to the Middle Ages. It was only towards the middle of the 18th century that major developments in metal cutting took place. Historically, up until the 19th century, water was used for centuries as a cooling medium to assist various metalworking operations. [Taylor, 1907] was probably the first to demonstrate the practical value of using liquids to facilitate metal cutting. The lathe, milling machine, shaping machine, saw and other machines were developed to meet the industry's need for low-cost, high-precision mass production. Nowadays metal cutting has become a very large segment of our industry and is indispensable for modern man. Wherever metal is used in any man-made object, you can be sure that it must have reached its final stage through processing with machine tools. Mineral oils were developed in this period as they had much higher lubricating power. However, their lower cooling capacity and high costs limited their use to low-cutting-speed machining operations. Finally, soluble oils were initially developed between 1910 and 1920 to improve the cooling properties and fire resistance of straight oils [Childers, 1994]. Other substances have also been added to these to control problems such as foam, bacteria and fungi. Oils as machining lubricants have also been developed by adding extreme pressure (EP) additives. Today these two types of cutting fluids (coolants) are known as water emulsifiable oils and straight cutting oils. Furthermore, semi-synthetic and synthetic cutting fluids have been developed to improve the performance of many machining operations [Mariani, 1990]. Today, cutting fluids play a significant role in manufacturing processes, supporting their high productivity and efficiency. Many types of metal cutting fluids used today are oils, oil-water emulsions, pastes, gels, aerosols (mists), and air or other gases. The objective of the present work is to examine the effects of minimum quantity lubrication on the cutting performance of medium carbon steel at different cutting speeds and feeds in terms of main cutting force and feed force, average temperature of the chip- tool, tool wear and surface finish. Irani et al. (2005) studied that heat generation is the limiting factor in the milling process due to the thermal damage associated with it. To combat this energy transfer, a cutting fluid is often applied during the operation. These cutting fluids hinder the amount of energy transferred to work through debris flushing, lubrication and engine cooling effects..