4-Jaw Set-Tru Scroll Chuck Features

  • Outstanding accuracy and quality, our solid steel body SET-TRU chucks can be used for all machining where standard scroll chucks are used, along with applications where tighter tolerances are required.
  • Chuck bodies hardened to 28 HRC, jaws hardened to 50 HRC, 4 micro adjustment screws for fine adjustment, and 0.0006” TIR repeatability make for a very rigid, reliable and accurate system.
  • 16”, 20” and 25” diameter chucks with 3 jaws and 6 jaws use 8 micro adjustment screws achieving extremely high gripping concentricity.
  •  Compare to Bison® Model 3765 - Series 7-847

Precision Defined.

Designed & Manufactured in Europe. All Forged Steel Bodies. 2-Year Warranty.


  • 2 Year Quality & Performance Warranty
  • All Forged Steel Bodies for durability and rigidity
  • All bearing surfaces are carefully hardened and machined at high tolerances.


  • 2-Piece Hard Reversible American Standard Tongue and Groove Jaws
  • Jaws are made of high quality alloy steel then hardened and ground

Standard Accessories

  • 1 set each Hard Master and Reversible Hard Top Jaws
  • 1 set Mounting Bolts
  • 1 Chuck Wrench
  • Eye Bolts for chuck sizes 16" and larger