CHUCK ADAPTER SLEEVE FOR A TWIST DRILL

A double-ended drill bit (50) having opposed cutting ends (52, 54) of different structural configurations is provided in combination with a sleeve or holder (10) to be received within a drill chuck. The sleeve is provided with a cylindrical body (14) having a top end with a pair of helically-shaped...

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Bibliographische Detailangaben
Hauptverfasser:	BYRLEY, DAVID, H, PHILLIPS, GREGORY, A, WIKER, JUERGEN, LOCKHART, ZANE, JR, NEWHOUSE, DEBBIE, ANN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BORING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING TURNING
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Beschreibung
Zusammenfassung:	A double-ended drill bit (50) having opposed cutting ends (52, 54) of different structural configurations is provided in combination with a sleeve or holder (10) to be received within a drill chuck. The sleeve is provided with a cylindrical body (14) having a top end with a pair of helically-shaped longitudinally extending members (16, 18) in spaced mating relation attached thereto. One cutting end of a drill bit is received within the cylindrical body and the spaced helically-shaped members. L'invention concerne un foret (50) double doté d'extrémités (52, 54) coupantes opposées de configurations de structure différentes, en combinaison avec un manchon (10) ou porte-outil destiné à être reçu à l'intérieur d'un mandrin de perçage. Ce manchon est prévu avec un corps (14) cylindrique muni à son extrémité supérieure de deux éléments (16, 18) s'étendant longitudinalement en forme d'hélice, montés de façon espacée, et fixés à ce corps. Une extrémité coupante de foret est reçue à l'intérieur du corps cylindrique et des éléments espacés en forme d'hélice.