Northfield Precision Instrument Corp., a leader in the design and manufacture of precision workholding chucks, introduces their 5C Collet Chuck. This chuck is interchangeable with their standard 4 inch chucks. Some features of the 5C Collet Chuck: Air actuated Uses Northfield's standard air feed tubes (wet or dry) Same bolt pattern as their standard 4 inch models All components hardened and ground to 58/63 HRC All diameters ground within 0.0001" TIR Uses standard 5C collets Can run at speeds in excess of 8,000 rpm .