| 摘要 |
<p>The device has an end (24) that is provided opposite to an end (14). A retainer (15) for a bar-shaped element (5) e.g. threaded rod, is provided at the end (14). A trimming unit (17) is provided in the retainer, where the trimming unit has a sharpening surface turned to the end (14). A cylindrical guiding section (16) is provided in the retainer between the trimming unit and the end (14). The sharpening surface is bent conical to a rotation axis (13) of a base (12) in direction of the end (24) of the base. The surface is bent in an angle (A) from 35 to 55 degrees to the axis.</p> |
