The stop block threads into the back of the collet knob. Included are four different length rods for various ranges of adjustment. The rods are held in place by a set screw. With the proper rod in place, the material is inserted in the collet until it hits the stop, providing a consistent position for a series of identical parts. A scribed mark 1.5" from the end of each rod shows when the rod is extended past a safe operating distance from the end of the spindle. If the scribed line can be seen, the next shorter rod should be substituted.
Download PDF 1152-1153 Instructions