Skull milling cutter with coolant liquid spray tube

The utility model provides a skull milling cutter with coolant liquid spray tube, its includes the spindle drum and the tool bit of cover tube -shape, the coaxial motor spindle that is provided with in the spindle drum, the tool bit clamping is in motor spindle is last, the front end of spindle drum one side edge is fixed to be provided with L shape and to protect the frame, the bending section correspondence that the frame was protected to L shape is in the axial one end of tool bit, wherein, axial positioning's cover is equipped with a pivoted ring cover relatively on the spindle drum, be provided with a spray tube mounting bracket on the outer axial plane of ring cover, spray tube mounting bracket fixed frame is equipped with a coolant liquid spray tube, the play liquid terminal pair of coolant liquid spray tube should the tool bit.