| 摘要 |
PCT No. PCT/DE88/00058 Sec. 371 Date Jul. 7, 1989 Sec. 102(e) Date Jul. 7, 1989 PCT Filed Feb. 6, 1988 PCT Pub. No. WO88/06070 PCT Pub. Date Aug. 25, 1988.An undercutting drill for obtaining a drill hole with a conical undercut. A drill shaft is provided connected in an articulated manner through a housing and containing a universal joint to a clamping shank. The face of the housing facing the joint. The drill shaft is provided with a plate having a stopping face, the vertical centerline of which is tilted in relation to the longitudinal axis of the drill shaft. |
