NC-SD | NC Starting Drills for Center Positioning (125°) | YAMAWA

Product Features

● The NC starting drill with a 125°drill point is a positioning drill dedicated to centering to increase hole positioning accuracy. The NC starting drill with a 125°drill is selected to be slightly larger than the tip angle of the general-purpose drill. This creates a highly accurate hole positioning without causing chipping on the cutting edge of the drill.

Recommended cutting conditions.

                                                                                                                                       Unit：min⁻¹         

• Standard feed rates (mm / rev) should be 1% to 3% of the drill diameter. In the case of machining on a curved surface or an inclined surface, please
  set a consistent feed rate of 0.1 mm / rev.