| 摘要 |
<p>On the cover surface of the basic body (18) at least on straight-lined or spirally shaped all-round groove-shaped cavity (19) is provided, in which very hard cutting material (21) is sintered. The cutting edge (21a) is made from very hard cutting material, as is a guide strip (21b). The groove-shaped cavity has a right twist or a left twist or no twist at all. Viewed in the rotation direction, in front of at least one hard material inlay a swarf groove (22) is machined. The basic body (18) of the form body is of hard metal, cast steel or similar. The cutting material (21) can be carbon boron nitride.</p> |
