4" 4 Jaw Independent Lathe Chuck Solid Hard Jaws

Picture shown is a 6" lathe chuck with 4 mounting through holes on the face of the chuck body; 4" lathe chuck's mounting holes is located on the back of the chuck with a bolt circle diameter of 3.307", not through the chuck body.  

• Accuracy is maintained for the entire clamping range
• Semi-steel chuck body made from high quality cast iron

• Four pinion design with each pinion ground and hardened to HRC 43
• Both side of 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 jaw to its designated chuck body, the jaw's finish machining are performed on a closed tolerance state of the art CNC machine from Japan

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

Clamping Range:

• Internal Jaw:
  • Clamping Range A-A1: 0.236-1.771"
  • Clamping Range B-B1: 1.574-3.937"