Abstract: A work-stop assembly in a work-holding-collet is formed of a main work-stop body selectively mounted on the rear of the work-holding-collet and defining a longitudinal through passageway aligned with the collet mouth. First and second work-stop position adjusters allow coarse adjustment of the position of a work-stop element by one of the adjusters while the work-stop assembly is removed from the work-holding collet and allow more precise adjustment by the other adjuster after the work-stop assembly is mounted to the work-holding collet. One of the adjustments employs a slidable relationship between the adjuster and the passageway, and one of the adjusters carries the work-stop element for axial movement in the work-holding-collet to set an adjustable depth limit for a workpiece inserted from a workpiece-receiving mouth at the front of the work-holding-collet.

Abstract: In a bar puller, pins mount serrated rollers to pivoting arms, which are mounted by additional pins to a bar puller body. The body houses movable cups positioned to compress springs in response to pivoting motion of the pivoting arms. A cover retains the springs and cups in the body. In a manufacturing process where elongated stock material needs to be positioned automatically, such as in a CNC turning center, the bar puller manipulates the elongated material in the machine by holding it rigidly so that the bar puller can move the elongated material on the axis of elongation. This is accomplished by forcing the end effectors over the material, which separates the end effectors by pivoting the arms. The geometry of the pivoting arms causes interaction with the cups and springs to generate an opposing spring force to separate the end effectors.

Abstract: In a bar puller, pins mount serrated rollers to pivoting arms, which are mounted by additional pins to a bar puller body. The body houses movable cups positioned to compress springs in response to pivoting motion of the pivoting arms. A cover retains the springs and cups in the body. In a manufacturing process where elongated stock material needs to be positioned automatically, such as in a CNC turning center, the bar puller manipulates the elongated material in the machine by holding it rigidly so that the bar puller can move the elongated material on the axis of elongation. This is accomplished by forcing the end effectors over the material, which separates the end effectors by pivoting the arms. The geometry of the pivoting arms causes interaction with the cups and springs to generate an opposing spring force to separate the end effectors.