Bit for a drill tool

The aim of the invention is to obtain a good system for removing chips from a drill tool (2). To this end, the bit (10) of the drill tool comprises a cutting region which is divided into three cutting sections, a central cutting section (16b) forming an inactive cutting section which borders an inne...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KRENZER ULLRICH FERDINAND, BORSCHERT BERNHARD WALTER, KAUPER HERBERT RULDOLF
Format: Patent
Sprache:chi ; eng
Schlagworte:
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Beschreibung
Zusammenfassung:The aim of the invention is to obtain a good system for removing chips from a drill tool (2). To this end, the bit (10) of the drill tool comprises a cutting region which is divided into three cutting sections, a central cutting section (16b) forming an inactive cutting section which borders an inner cutting corner (18) on an active cutting section (16a) close to the centre. The distance (R1) of the inner cutting corner (18) from the central axis (4) of the drill bit is somewhat larger than a core radius (R4) of the core (23) of a drill bit, and the inactive cutting section (16b) is thereforemoved back in the radial direction approximately opposite the inner cutting corner (18). In this way, during operation, the chips removed are split into two groups parts (28a, 28b), thereby obtaininga reliable chip removal system.