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4" 4 Jaw Independent Lathe Chuck Solid Hard Jaws

Online Price Only: $66.95 Regular Price: $110.95
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More Information
Mfg SKU #202-5419
Lathe Chuck CategoryIndependent Lathe Chucks
BrandShars Tool
chuck diameter4
Thru Hole Size0.984
mountingplain back
Bolt Circle Diameter3.307
chuck thickness2.126
jaw movementindependent
Number of Jaws4
Maximum RPM3500
Maximum Input Torque Nm30


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 operating screw design with each 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

  • Operating screw'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"


What’s Included

  • Included 1 set of reversible solid hard jaws
  • 4 mounting screws
  • 1 lathe chuck key
  • Inspection report on runout on both inside and outside jaws