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Branch: : Mechanical Engineering
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The basic function of milling machines is to produce flat surfaces in any orientation as well as surfaces of revolution, helical surfaces and contoured surfaces of various configurations. Such functions are accomplished by slowly feeding the work-piece into the equi-spaced multi-edge circular cutting tool rotating at moderately high speed. Up-milling needs stronger holding of the job and down-milling needs backlash free screw-nut systems for feeding.