| 摘要 |
<p>A hole saw (200) comprises a cup (202) with two cutting teeth (204) positioned on the open end of the cup (202). The two cutting teeth (204) are substantially diametrically opposed to one another to provide a balanced cutting engagement of the media and are spaced apart by a chord length of between about 45 and 180 degrees. A pair of secondary gullets (207) are positioned in the cup (202) proximate to a forward cutting edge (206) of the two cutting teeth (204). The secondary gullets (207) have a predetermined depth and shape along a longitudinal axis of the cup (202) to suitably remove debris from the cup (202) during a portion of the duration of the hole cut. A plurality of raker teeth (212) may be positioned on the chords defining the spacing between the cutting teeth (204). The raker teeth (212) are disposed below the cutting teeth (204), approximately 0.030 inches to engage and move cutting debris formed by the cutting teeth (204).</p> |
