Machining collet chuck

workpiecepneumatic

These custom 7" diameter chucks use the small internal-grip collet to center the workpiece while the outer “spit fingers” face the clamp. The collet is spring-clamp/draw-bar open. The split fingers are actuated by the draw bar. The fingers go inside the bolt-hole, expand and face clamp, mimicking how a bolt would hold the part. The chucks are used for balancing drive shafts and grip what is called a “rubber coupling” at speeds up to 6,000 rpm.