4" 4 Jaw Independent Chuck Solid Hard Jaws

SKU 202-5419

4" 4 Jaw Independent Chuck Solid Hard Jaws

Availability In stock

Shipping Ups Ground

Regular Price: $100.60

Online Price Only $62.92

SKU 202-5419
Lathe Chuck Category Independent Lathe Chucks
chuck diameter 4
thru hole size 0.984
mounting plain back
Bolt Circle Diameter 3.307
chuck thickness 2.126
jaw movement independent
Number of Jaws 4
Maximum Speed RPM 3500
Maximum Input Torque Nm 30
Full Details

Product Spotlight

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


Item No. size (inch) Back Mounting D (inch) D1 (inch) D2 (inch) D3 (inch) H (inch) H1 (inch) h (inch) z-d (metric)
202-5419 4 plain back 3.937 2.835 3.307 0.984 3.031 2.126 0.157 4-M8

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