Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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IMPEX-ESSEN VERTRIEB VON WERKZEUGEN GMBH
Original Assignee
IMPEX-ESSEN VERTRIEB VON WERKZEUGEN GMBH
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Application filed by IMPEX-ESSEN VERTRIEB VON WERKZEUGEN GMBHfiledCriticalIMPEX-ESSEN VERTRIEB VON WERKZEUGEN GMBH
Priority to ES1980251425UpriorityCriticalpatent/ES251425Y/en
Publication of ES251425UpublicationCriticalpatent/ES251425U/en
Application grantedgrantedCritical
Publication of ES251425YpublicationCriticalpatent/ES251425Y/en
Processing Of Stones Or Stones Resemblance Materials
(AREA)
Abstract
Small drill bit, especially helical or pinhole drill bit, with a rod fixedly clamped in a three-jaw chuck of a drilling machine, characterized in that the clamping shank has a hexagonal profile. Drill according to claim 1, characterized in that the distance between opposing faces of its hexagonal clamping shank is smaller than the diameter of its remaining shank part. 3. A three-jaw mandrel in drilling machines provided with a small drill bit thereon with a hexagonal clamping shank, according to claims 1 or 2. 4. Small drill (Machine-translation by Google Translate, not legally binding)
ES1980251425U1980-06-161980-06-16
SMALL DRILL BIT.
ExpiredES251425Y
(en)
Process for clamping, with a defined free working length, a drilling or milling tool of a circuit board drilling machine in the collet equipped drilling spindle of that machine