Item #: 97018931Brand: 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. Forged steel or steel chucks have greater accuracy, less wear and can be operated at higher RPM's. Product Specifications Manual Lathe Chucks; Chuck Type: Self-Centering ; Nominal Chuck Size: 8 ; Number of Jaws: 3 ; Mount: Adjustable ; Through-Hole Diameter (Decimal Inch): 2.1654 ; Body Material: Forged Steel Chuck Type Self-Centering Nominal Chuck Size 8 Number of Jaws 3 Mount Adjustable Through-Hole Diameter (Decimal Inch) 2.1654 Body Material Forged 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 Yes TIR Repeatability (Decimal Inch) 0.0004 Body Length (Inch) 3-1/16 Maximum RPM 3100