| 摘要 |
PCT No. PCT/EP90/02293 Sec. 371 Date Sep. 25, 1991 Sec. 102(e) Date Sep. 25, 1991 PCT Filed Dec. 21, 1990 PCT Pub. No. WO91/11631 PCT Pub. Date Aug. 8, 1991.A self-drilling connecting unit includes a shaft and a platelet-like cutting tool attachable to the shaft in a form- and/or force-fitted manner. The platelet-like cutting tool has a platelet-like protrusion lying in the plane of the cutting tool in its end region facing the shaft. The end region of the shaft, which bears the cutting tool, has a central opening. The protrusion of the cutting tool is insertable into the opening of the shaft and is braced by a pressure seat in the opening against two diametrically opposed boundaries of the inner wall of the opening whereby a sufficient mount and an exactly axis-parallel alignment of the cutting tool against the shaft are provided.
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