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It is described as a tool that rotates a circular tool with numerous cutting edges arranged symmetrically about its axis, called a milling cutter. Cutters of many shapes and sizes are available for a wide variety of milling operations. Milling machines cut flat surfaces, grooves, shoulders, inclined surfaces, dovetails, and T-slots.Various form-tooth cutters are used for cutting concave forms and convex grooves, for rounding corners, and for cutting gear teeth. There are different types of milling machines available in the industrial market like Knee-type milling machines, vertical milling machines, universal / plain horizontal milling machine, universal ram type /ram-type milling machine, swivel cutter head ram type milling machines, bed type milling machines. Vertical milling machines though has lower processing speed than another type of the milling machines it has high flexibility and good handling. There are several accessories also available in the market for the milling process
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