Centre Lathe Accessories - Four jaw chuck
 
This four- jaw independent chuck has four jaws; each of which can be adjusted independently by a chance wrench.

They are used to held wound, square, hexagonal, and irregular-shaped work pieces. The jaws can be reversed to hold work by the inside diameter.

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Advantages of four jaw chuck:
  • Work can be centred to high precision
  • Can handle square/rectangular bar
  • can turn work off-centre
  • slightly more grip on round stock
  • Internal and external jaws available

 

 Disadvantages of four jaw chuck:
  • Slower and difficult to mount work (dial-indicator required)
  • can't hold hex-stock