| 摘要 |
<p>The invention relates to a facing cutter for making annular holes. At the lower end of the jacket (2) of the cutter a plurality of cutting teeth (3) are formed, each tooth having an inner cutting edge (4) and an outer cutting edge (5). Adjacent cutting teeth are of alternately different construction, such that adjacent teeth may cut a different portion of the groove to be formed. Since at all cutting teeth the outer end of the inner cutting edge and the inner end of the outer cutting edge are offset a distance with respect to each other it is made possible to cut four different chips of substantially equal size with two adjacent cutting teeth.</p> |
