Bison 4-Jaw 2Pc. Set-Tru Scroll Chuck Hard Reversible Jaw 8" Dia. - 7-847-0800

• SET-TRU Scroll Chucks can be used for all machining operations where universal chucks are used, along with applications where universal scroll chucks require tighter tolerances
• Outstanding accuracy, versatility and long life make SET-TRU chucks invaluable in the modern workshop and indispensable in the toolroom

SET-TRU Chuck Features and Benefits:

• Fine adjustment
• Available with forged steel body or semi-steel body
• 3 pinion design
• 4 micro adjustment screws provide .0004" T.I.R. repeatability
• 16", 20" and 25" diameter chucks with 3 jaws and 6 jaws use 8 micro adjustment screws achieving extremely high gripping concentricity
• Two piece top and master jaws are American Standard tongue and groove
• 4" diameter chuck has 2 sets of solid jaws
• Scrolls are forged and fully hardened with thread flanks ground on both sides, then precisely balanced for longer life and higher accuracy
• Each scroll is precisely balanced
• Jaw teeth and guides on both sides are fully hardened and ground. Hardened and ground bushings are pressed into the pinion seats. Pinions in 3 pinion models are hardened and ground
• Each chuck is balanced within fine limits 
• Steel mounting plates are interchangeable with SET-TRU chucks of the same size so that one chuck can be used on different spindles
• The life of your chuck can be extended significantly through proper maintenance and must be cleaned on a regular basis as recommended

Each chuck is provided with:

• 1 Set of hard master jaws
• 1 Set of hard top reversible jaws
• 1 Chuck wrench
• 1 Set of mounting bolts
• 1 Set of fine adjustment screws
• 2 Hex keys

For More Bison 4 & 6 Jaw Set-Tru Scroll Chucks Hard Reversible Jaws Click Here