Item #: 97018816Brand: HertelModel #: Features and Benefits Self-centering scroll chucks are designed with jaws on a scroll which open and close with a wrench that is turned on a pinion. They accurately self-center on the workpiece as the jaws close. Cast iron also called semi-steel is the industry standard for chuck body material. Product Specifications Manual Lathe Chucks; Chuck Type: Self-Centering ; Nominal Chuck Size: 6 ; Number of Jaws: 4 ; Mount: Plain Back ; Through-Hole Diameter (Decimal Inch): 1.7720 ; Body Material: Cast Iron (Semi-Steel) Chuck Type Self-Centering Nominal Chuck Size 6 Number of Jaws 4 Mount Plain Back Through-Hole Diameter (Decimal Inch) 1.7720 Body Material Cast Iron (Semi-Steel) Reversible Jaws Reversible Jaws Chuck Diameter (Inch) 6 Minimum Jaw Capacity (Inch) 5/16 Maximum Jaw Capacity (Inch) 6-19/64 Jaw Height (Inch) 1-7/32 Adjustable No Jaw Type Solid Jaws Axial Runout (Decimal Inch) 0.0008 Body Length (Inch) 2-9/16 Maximum RPM 3200