Northfield Precision Instrument Corp., a leader in the design and manufacture of precision workholding chucks, introduces their Model DPH-600W chuck. This 6in. diameter, 6-jaw diaphragm chuck has special jaws and stop to grip a plasma welding nozzle. The stop has 6 "air detect" holes .040 diameter for part seating confirmation. The chuck is counter balanced to maintain exact jaw for up to 6,500 rpm.