| 摘要 |
<p>An anchoring bolt (1) comprises a connection portion (2), a smooth rod element (3) and a portion (4) intended to be embedded with protruding inserted hard metal elements (30) and/or presenting a profiling (9). The portion (4) is provided with an axial slot (10) wherein a movable spacing piece (13) penetrates. During the driving in, the spacing piece (13) bears on the bottom of the hole and spaces apart the portion (4) lined with hard metal elements (30). The originally cylindrical hole (21) filled with a mortar cartridge (20) is thereby provided with a conical undercut.</p> |
