| 摘要 |
The expanding plugs to be inserted into masonry can be inserted in a positive-locking manner into holes with an undercut. To produce such an undercut, a drill is used whose drill tips project beyond the drill shank so that the undercut is produced by a pivoting movement of the drill. …<??>In order to obtain a defined pivoting range and thus defined undercuts, a guide sleeve surrounding the drill shank is provided which preferably has a conical inner surface. The conical inner surface limits the pivoting range of the drill. …<IMAGE>… |
