我厂在加工电机主轴时,要在主轴一端深孔部位钻削6个与轴心线夹角为60°的斜孔,孔径为φ20～φ30mm。 我们采用成都量具厂生产的锥柄三刃扩孔钻头改磨成60°斜孔三刃钻头,在生产中使用良好(见图)。 When machining the main shaft of the motor, we should drill 6 inclined holes with an angle of 60 ° with the shaft center at the deep hole part at one end of the main shaft. The hole diameter is φ20 ~ φ30mm. We use taper shank taper shank drills manufactured by Chengdu Measuring Tool Factory to grind into 60 ° inclined hole three-bladed drill bits, which are used well in production (see photo).