In addition, the chuck restricted workpiece size to 2-in. Thus, machine operators switched from either the three-jaw or collet chuck on a regular basis to accommodate particular job requirements. This procedure increased setup time for short runs to an unacceptable level. Gripping remains constant regardless of rotational speed and is adjustable. The chuck does not require any external actuators since the actuator is built in.
Air is used only to open the chuck.
Spring force holds the workpiece while it is being machined. Thus the part remains clamped, even if air pressure is lost. Clamping force is adjustable by tightening or loosening the collet, using the spanner holes in the front of the collet. The Full-Bore Chuck from Productin Dynamics provides constant grip force regardless of spindle speed. Now, the chuck allows bar stock to be advanced to a length suitable for ten parts at a time with no push-back during boring.