Details
4" (4 inch) 3 Jaw Precision Self Centering Lathe Chuck with 2 sets jaw

Chuck Outside Dia. 4".
Chuck Body Thickness: 2".
Center Thru Hole Dia.: 0.8661".
Bolt Circle Dia.:3.3071".
Mounting Thread: 3-M8. RPM: 4,200.
High precision self-centering design. Superior gripping force to meet precision machining demands. Flimsy parts are specifically engineered by quenching process to enhance durability. Internal Jaw Clamping Range: 0.0787" (2mm) -1.1811" (30mm). Internal Jaw Jamming Range: 1.1811" (30mm) - 3.5433" (90mm). External Jaw Clamping Range: 1.1811" (30mm) - 3.1496" (80mm). Accuracy: 0.002"(tested vertical<0.002"; horizontal<0.002"). Short cylindrical center mounting. Packages includes one set of solid steel internal jaws, one set of solid steel external jaws, and chuck wrench. Body is made of high quality nodular cast iron suitable for high rotation speed.