Item #: 97018402Brand: 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: 8 ; Number of Jaws: 4 ; Mount: Plain Back ; Through-Hole Diameter (Decimal Inch): 2.1654 ; Body Material: Cast Iron (Semi-Steel) Chuck Type Self-Centering Nominal Chuck Size 8 Number of Jaws 4 Mount Plain Back Through-Hole Diameter (Decimal Inch) 2.1654 Body Material Cast Iron (Semi-Steel) Reversible Jaws Reversible Jaws Chuck Diameter (Inch) 8 Minimum Jaw Capacity (Inch) 5/32 Maximum Jaw Capacity (Inch) 7-7/8 Jaw Height (Inch) 1-53/64 Adjustable No Axial Runout (Decimal Inch) 0.0010 Radial Runout (Decimal Inch) 0.0016 Body Length (Inch) 2-61/64 Maximum RPM 2500