A kind of improvement metal cuts bits conveyor, basically be one screw type is set to discharge bits axis inside chamfer of a bits, this bits chamfer outputs termination to set canal of a bits, the spiral ribbon that its feature is this bits axis has change of two kinds of different pitch, among them hind paragraph before the spiral ribbon pitch of the axis that discharge bits is more than paragraph the spiral ribbon pitch of the axis that discharge bits, hind paragraph axial protruding extends platoon bits to be in charge of at discharging bits inside, end of entrance of this canal that discharge bits forms one funnel state and exit end forms cylinder state, around of axis of bits of platoon of by means of paragraph the spiral ribbon of different pitch, after discharging bits axis in order to increase paragraph carry speed to cut bits collect in order to avoid a metal to accumulate at the platoon bits is in charge of the entrance to carry or platoon bits chamfer outputs end, in order to improve a bits efficiency. CNC MillingCNC Machining