Abstract: The present invention relates to a chuck for gripping workpieces having an outer chuck body rotatable about a chuck axis and defining a cavity. The chuck includes a collar, coupled to the outer chuck body, having a slot with a slot axis angled relative to said chuck axis. An inner chuck body located within the cavity is movable along the chuck axis relative to the collar and the outer chuck body. The inner chuck body includes a bore having a bore axis angled relative to said chuck axis into which the jaw rod is disposed, with the jaw rod being coupled to the collar.

Abstract: A drawn down chuck for gripping the inner or outer diameter of a workpiece. The chuck includes rotatable jaws disposed in a chuck body. The rotatable jaws helically and then linearly retract into the chuck body to secure workpieces having a shaft and an enlarged offset such as a hub or flange proximate to the end of the shaft. Cam assemblies interact with the jaw rods to provide the helical and linear movement. The cam assemblies include a cam groove and a cam follower, wherein the cam groove has a linear and a helical segment. The cam follower is operatively engaged on the cam groove as the jaw rod moves between the extended and retracted position so that when the jaw rod is retracted it first moves helically and then axially.

Abstract: A drawn down chuck for gripping the inner or outer diameter of a workpiece. The chuck includes rotatable jaws disposed in a chuck body. The rotatable jaws helically and then linearly retract into the chuck body to secure workpieces having a shaft and an enlarged offset such as a hub or flange proximate to the end of the shaft. Cam assemblies interact with the jaw rods to provide the helical and linear movement. The cam assemblies include a cam groove and a cam follower, wherein the cam groove has a linear and a helical segment. The cam follower is operatively engaged on the cam groove as the jaw rod moves between the extended and retracted position so that when the jaw rod is retracted it first moves helically and then axially.

Abstract: A chuck for gripping long hollow workpieces has two independent sets of jaws actuated to the work-gripping and releasing positions by two independent puller plates. The puller plates are spring biased to shift the jaws to the work-gripping position. A single axially shiftable actuator has a lost motion connection with each puller plate to shift the jaws to the work-releasing position. The actuator also operates a safety latch which prevents accidental axial displacement of the workpiece on the chuck and a radial jack which provides radial support to a section of the workpiece subjected to a radial machining load.

Abstract: The chuck disclosed has three radially movable jaws for gripping and releasing a workpiece. The jaws are displaced radially by means of a draw-bar actuated puller plate coupled to the inner ends of inclined, radially extending rods on which the jaws are mounted. The puller plate is swivelly coupled to the drawbar and to the jaw rods to enable the jaws to firmly grip a workpiece around a surface which is not concentric to a previously machined centering surface on the workpiece and by means of which the workpiece is positioned on the chuck. Means are provided for optionally preventing swiveling movement of the puller plate.

Abstract: A workpiece chuck has a plurality of support blocks adapted to be mounted on the front face of the chuck body in circumferentially spaced relation and at various locations spaced radially different distances from the central axis of the chuck. Within each support block a jaw rod is arranged for sliding movement along an axis inclined at an acute angle to the central axis of the chuck. A coupling interconnects the inner end of each jaw rod with an axially displaceable puller plate within the chuck body. The front plate of the chuck and the puller plate are formed with registering, radially elongated openings to permit radial adjustment of the jaw rods and to enable them to be retracted outwardly from the chuck body together with their support blocks.

Abstract: The chuck disclosed has a work-gripping collet at the longitudinal axis thereof which is surrounded by front and rear annular slides that are spring biased in an axially forward direction. The slides are independently shiftable axially. The inner peripheral surface at the front end portion of the front slide and the inner peripheral surface at the rear end portion of the rear slide are inclined radially inwardly and axially rearwardly to correspond with the inclination of the outer surface of the externally tapered workpiece. The workpiece is telescoped rearwardly over the collet so that its external surface is first engaged by the inclined surface on the rear slide and then by the inclined surface on the front slide. After the leading end of the workpiece engages a part stop on the chuck the collet is shifted rearwardly to firmly grip the workpiece.

Abstract: A chuck for splined workpieces includes at least two collets, the resilient fingers of which are circumferentially interdigitally related. The work-engaging surfaces of circumferentially adjacent fingers of the chuck are spaced apart a distance at least slightly greater than the circumferential extent of each radially facing splined surface on the workpiece, the arrangement being such that, when a splined workpiece is telescopically engaged with the collets, fingers of not more than one of the collets register with the radial surfaces of the splines so that the remaining collet fingers will grip the base diameter surface of the workpiece when the collets are actuated.

Abstract: A bore concentricity gage having a collet at one end adapted to be expanded into close fitting engagement with one of two axially spaced bores on a workpiece and a hollow concentricity plug at its opposite end adapted to be received in close fitting engagement with the other bore. The plug has an accurately concentric bore therein adapted to be engaged by a rotatable "go" bushing journalled on a mandrel having an expander for the collet thereon.