7-850-0300 4-Jaw (Solid) Independent Chuck Steel Body Plain Back 3-1/2in, Type 4306-85, Bison-Bial


Over 50 years of Quality European Manufacturing have made BISON the number one choice for Lathe Chucks. Whether scroll, independent or collet, these chucks are not just a exceptional value. Offered with direct spindle mounting or special application back plates, Bison Chucks are easy to install and maintain.
When it comes time for a New Chuck, Give the Guys at Ajax a call. And Let us help you get Your Lathe UP and Turning!
Ajax Sales and Service: 1 (800) 543-5998
Technical Details
Chuck Diameter D in 3.5
Chuck Body Steel
Chuck Jaws solid
Maximum Speed RPM 4000
Weight lb 3.4
Load Capacity lb 33
Hole Diameter d in .9843
Max Hole Enlargement d1 in 0.9843
E in 2.4409
F in 2.8346
C in .1969
H in 1.5748
h1 in .6693
Chuck Mounting Bolts Thread 1/4 - 20
Chuck Mounting Bolts L 1-1/4
Chuck Mounting Bolts Qty 4

d1 min in 0.118
d2 max in 3.346
d3 Chuck Thru Hole in 0.984
Manufacturer Model Number 4304
Accessories and Parts
7-889-003 Wrench for 3 and 4in Scroll/Indep. Chuck
7-890-103 Hard Solid Rev.Jaws, 3in, 4 Pc Set
7-890-1030 Hard Solid Rev.Jaw, 3in, 1 Pc
7-890-603 Operating Screw-Part for 3" Indep.Chuck
7-897-498 Mounting Bolt 1/4-20 x 1-1/4" Long
7-909-3045C Fixture Adapters,Soft - 3in & 4in
7-890-703 Thrust Bearings for 3in Indep.Chuck
Spare parts and jaw options are readily available, an Ajax Lathe Chuck Technician is available to assist you.