| 摘要 |
<p>A metal cutting insert (10) comprises a top surface (12) which is intersected by a frusto-conical edge surface (16) to form therewith a round cutting edge (18). Five equidistantly spaced flat facets (26) are formed in the edge surface (16). Upper ends of the facets are spaced below the cutting edge. A fixing screw secures the insert to the seat of a holder, such that two of the facets are pressed against respective flat contact areas formed on a locating surface of the holder. Each facet forms an acute angle relative to a central axis (25) of the insert.</p> |
