Northfield Precision Instrument Corp., a designer and manufacturer of precision workholding chucks, introduces their special 6" diameter 6-jaw chuck with ½" of jaw stroke on diameter and a ½" counterbore in the center. It has sub-jaws, inserts and a special air ejector that is spring return. This chuck was designed for Tiffany Co., the jewelry store. It is used to make Gold and Platinum rings that are bar fed from the main spindle and finished in the sub-spindle on this Northfield chuck. It is rated for 4,000 rpm with low profile jaws.