| 摘要 |
The drill has a grinding disc (10) and at least one front spiral of at least two detachable from each other, axially pushed into each other front spiral sections (14,15,16). The front spiral sections are so connected with each other that the spiral threads (18,20;20,24) of each section in the division plane are flush with each other. The front grinding disc has a countersinking drill (12) ahead of it.
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| 申请人 |
GEBRUEDER HELLER DINKLAGE GMBH, 49413 DINKLAGE, DE |
发明人 |
KERSTEN, HEINRICH, DIPL.-ING. (FH), 27283 VERDEN, DE;PRECHT, HARTMUT, DIPL.-ING. (FH), 49413 DINKLAGE, DE |
