The shank of the straight shank end mill is cylindrical, which is different from the conical milling cutter. The main cutting edge is the cylindrical surface, and the cutting edge on the end surface is the secondary cutting edge. When working, the feed movement cannot be made along the axial direction of the milling cutter. According to the national standard, the diameter of the end mill is 2-50 mm, which can be divided into two types: coarse teeth and fine teeth. The diameter of 2-20 is the range of straight shank, and the diameter of 14-50 is the range of tapered shank. There are many shapes of milling cutters, which are used for ordinary milling machines and CNC milling machines to process grooves and linear contours, and to process cavities, cores, and surface shapes/contours on milling and boring machining centers.

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