Fig. 1987.
Another very handy form of chuck for general work is the angle chuck shown in [Fig. 1987], which is from an article by John J. Grant, in The American Machinist. The work-holding plate has T-grooves to chuck the work on and is pivoted at one end, while at the other is a segment and bolt to secure it in its adjusted angle. Two applications of the chuck are shown in the figure.
Fig. 1988.
Fig. 1989.
[Fig. 1988] represents a top, and [Fig. 1989] an end view of a chuck to hold rectangular bars that are to be cut into pieces by a gang of mills. a, a, a, are grooves through the chuck jaws through which the cutters pass, severing the bar through the dotted lines. Each piece of the bar is held by a single screw on one side and by two screws on the other, which is necessary in order to obtain equal pressure on all the screws and prevent the pieces from moving when cut through, and by moving, gripping the cutters and causing them to break.
In chucking the bar the two end screws d d must be the first to be set up to just meet the bar: next the screws b c on the other side must be set up, holding the bar firmly. The two screws between d d are then set up to just bind the bar, and then the middle four on the other side are screwed up firmly. By this method all the screws will hold firmly and the pieces cannot move.