| 摘要 |
<p>The invention relates to a rotatable and reversible cutting attachment (1) cutting eight ways and comprising two opposing, essentially quadratic base surfaces (2) which can be mutually rotated about a central axis (A) extending perpendicularly to said surfaces, and four identical lateral surfaces (3). A main cutter is formed between each base surface (2) and each lateral surface (3), extending only over part of the length of the lateral surface (3). Each lateral surface (3) comprises two diagonally opposed circular or curved corner edges (5) forming a secondary cutter (6) adjacent to each main cutter (4). Each lateral surface also comprises two chip cavities (7) which are set in the lateral surface (3) and extend from each corner edge (5) along the main cutter associated with the edge, up to a rear end of the chip cavity (7d).</p> |
