Abstract: A chuck device includes a tube with a plurality of inclined holes defined therethrough and a plurality of clamping members are respectively inserted in the inclined holes. Each clamping member has teeth defined in an outside thereof. A nut is mounted to the tube and has threads defined in an inner periphery thereof so as to be engaged with the teeth of the clamping members. A groove is defined in the inner periphery of the nut and balls are received in the groove. A pressing ring is received in the nut and positions the balls. A sleeve is mounted to the nut and has protrusions on an inner periphery of the sleeve, the protrusions being engaged with notches defined in an outer periphery of the nut. When rotating the sleeve, the nut is rotated to move the clamping members.

Abstract: A chuck device includes a tube with a plurality of inclined holes defined therethrough and a plurality of clamping members are respectively inserted in the inclined holes. Each clamping member has teeth defined in an outside thereof. A nut is mounted to the tube and has threads defined in an inner periphery thereof so as to be engaged with the teeth of the clamping members. A groove is defined in the inner periphery of the nut and balls are received in the groove. A pressing ring is received in the nut and positions the balls. A sleeve is mounted to the nut and has protrusions on an inner periphery of the sleeve, the protrusions being engaged with notches defined in an outer periphery of the nut. When rotating the sleeve, the nut is rotated to move the clamping members.