| 摘要 |
<p>A drill bit for drilling a bore is disclosed. The drill bit includes a body having a shank portion, a tip portion and an axis of rotation therethrough. The tip portion has a plurality of touching points, wherein all of the plurality of touching points form a plurality of cutting edges that are aligned along the entire length of a common diameter line. Alternately, the plurality of cutting edges may be aligned along the entire length of a diameter of the drill bit on different diameter lines.</p> |
