<p><b>3 Inch Lathe Chuck Self-centering 3 Jaw 80 mm Internal and External Jaw Sets</b></p> <p>This 80 mm (3.15 inch) 3-jaw self-centering chuck features short cylindrical center mounting. It can be used to extend the machine functions. Both side of jaw teeth and guides are ground and hardened to HRC 58-62. Each chuck having gone through rigorous accuracy and repeated inspection.</p> <p><b>Features: </b></p> <p>Semi-steel chuck body made from high quality cast iron, durable in use</p> <p>Accuracy is guaranteed in entire clamping range</p> <p>One set of solid steel internal jaws, one set of solid steel external jaws and chuck wrench are included</p> <p>Each chuck has gone through rigorous examination of accuracy and repeatability</p> <p><b>Specification: </b></p> <p>Size: 80 mm (3.15")</p> <p>Outside Diameter: 80 mm (3.15")</p> <p>Bolt Circle Diameter: 66 mm (2.6")</p> <p>Center Thru Hole Diameter: 16 mm (0.63")</p> <p>Chuck Body Thickness: 50 mm (1.97")</p> <p>Internal Jaw Clamping Range (A-A1): 2-22 mm (0.078"-0.866")</p> <p>Internal Jaw Jamming Range (B-B1): 25-70 mm (0.98"-2.756")</p> <p>External Jaw Clamping Range (C-C1): 22-63 mm (0.866"-2.48")</p> <p>Mounting Thread: 3-M6</p> <p>Accuracy: 0.002"</p> <p>Gross Weight: 4 lb (1.8 kg)</p> <p>Package Dimensions (L x W x H): 4.7" x 4.7" x 4.7" (12 x 12 x 12 cm)</p> <p><b>Package Content: </b></p> <p>1 X 80 mm/3 Inch Lathe Chuck Body</p> <p>3 X Internal Jaws</p> <p>3 X External Jaws</p> <p>3 X Mounting Bolts</p> <p>1 X Safety Chuck Key</p>