Flute section and reamer cutting portion, since the structure is more complex, cutting tools contour curve has some difficulties, use a conventional machining there are some difficulties, so you can use advanced CNC milling machine or machining center for processing. Select automatic programming method for three-dimensional solid modeling tool, the effect is shown in Figure 2. The model post-processing, generate automatic programming processing procedures, and complete machining on CNC milling machine or machining center. The rest of the tool processing steps, such as grinding tool diameter, reamer sharpening cutting edges chamfered edges, handle, front angle, similar to the traditional processing methods.