Hatachi Tool Engineering, Ltd.
|Hatachi Tool Engineering, Ltd. Patent applications|
|Patent application number||Title||Published|
|20100178121||SMALL-DIAMETER DEEP HOLE DRILL AND A MICRO DEEP HOLE DRILLING METHOD - A small-diameter drill for deep hole drilling is provided which is capable of inhibiting the cutting chips from getting bitten and producing a straightness for a drilled hole, thus suitable for drilling a hole having a depth (L) which is 15 or more times the diameter (D) of a drilled hole. The small-diameter drill||07-15-2010|