Counter bore processing boring milling cutter

The utility model discloses a counter bore processing boring milling cutter, it includes boring milling cutter pole, blade and blade screw, and the head size of boring milling cutter pole is greater than the pole body size of boring milling cutter pole, and the blade is triangle structure, and the blade passes through the blade screw and installs the dress sword inslot at boring milling cutter pole head, and stretch out in boring milling cutter rod one -tenth cutting edge on one of them limit of blade, and the both ends of cutting edge are the knife tip, and the cutting edge is perpendicular with the axis of boring milling cutter pole, and the blade baseplane is 12 contained angles with the axis of boring milling cutter pole. The utility model discloses simultaneously finish machining counter bore hole and bottom face portion position have reduced tool changing time 50% or more, have reduced the tool setting time and the degree of difficulty, and the machining precision height has improved quality and perform