| 摘要 |
The invention relates to a drilling tool including a shaft (1) having a front end to which a cutting body provided with cutting edges (2) is detachably connected. In the front end of the shaft (1), a seat is formed which is delimited by spaced-apart protrusions (4, 5) between which there is a bottom surface. In the protrusion (4), there is a threaded hole for a screw (8), which alone guarantees the fixing of the cutting body and which is of such a nature that it on tightening it applies pre-stressing forces to the cutting body. On the inside of the opposite protrusion (5), there is a supporting shoulder (15) against which the cutting body is pressed when the screw is tightened and applies a lateral pre-stressing force to the cutting body. Characteristic of the invention is also that the protrusions (4, 5) are laterally displaced in relation to each other in order to freely expose the screw (8) beside the protrusion (5). <IMAGE> |
