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B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23B—TURNING; BORING
B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
B23B31/02—Chucks
B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
B23B31/1207—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
B23B31/1253—Jaws movement actuated by an axially movable member
Gewindebohrer mit Schneidbacken, die unter Federwirkung stehen und durch einen zentrisch im Bohrerschaft laengsverschiebbar gefuehrten Bolzen verstellt werden, der zur Verschiebung und Feststellung der Schneidbacken mehrere runde Bunde mit anschliessenden Schraegflaechen besitzt, die vom inneren Ende des Bohrers nach dem aeusseren im Durc hmesser immer kleiner werden
Sich selbst oeffnender Gewindebohrkopf zur Herstellung kegelfoermigen Gewindes mit mehreren im Kopf gelagerten, durch einen kegeligen Dorn verstellbaren Gewindeschneidbacken