Cutter
The cutter is uses the jacking cutting form, the center drill and the jacking cutting fission puts all in one load. The hilt inner cone and the drill rod coordination connects a center drill end to turn on lathe into the drill rod center spiral hole calmly to fasten the knife tube, the center drill gets up the cutting to be calm, and is equipped with a U shape in above to clamp, it was unmistakably the saddle block which cut has cancelled accurately and its extraction.