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4" 3 Jaw Front Mounting Self Centering Lathe Chuck

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More Information
Mfg SKU #202-5600
Lathe Chuck CategorySelf Centering Scroll Chucks
BrandShars Tool
chuck diameter4
Thru Hole Size0.866
mountingfront mounting
chuck thickness2.165
TIR (inch)0.003
reversible jawno
Number of Jaws3



  • 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
  • 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"

What’s Included

  • 2 set of jaws: inside jaw set and outside jaw set
  • 6 piece of mounting screws for the lathe chuck back plate (3 screws for front mounting and 3 screws for back mounting)

  • 1 hexagon wrench