4" 3 jaw Self Centering Scroll Lathe Chucks Solid Jaws

• Semi-steel chuck body made from high quality cast iron

• Each pinion is ground and hardened to HRC 43
• Both sides of the jaw teeth and guides are ground and hardened to HRC 58-62

• Each set of jaws are serialized in their own set

• A serialized set of jaws are then finished, ground, and lapped on their designated chuck body which will be the same chuck body on the final assembly to achieve a greater accuracy

• Before assembling the jaws to its designated chuck body, the jaws finish machining is performed on a close tolerance state of the art CNC machine from Japan

• The scroll plate's thread flank are ground on both sides to achieve tighter contact with the master jaw
• Each chuck has gone through rigorous accuracy and repeatability inspection by clamping and jamming multiple random testing rods or rings

• Accuracy is maintained for the entire clamping range

Clamping Range:

• Internal Jaw:
• Clamping Range A-A1: 0.078-1.181"
• Jamming Range B-B1: 1.181-3.543"

• External Jaw
• Clamping Range C-C1: 1.181-3.150"