The Original BUCK CHUCK
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Model PB

Pull-Back Power Chuck

Buck Forkardt’s superior performance "Pull-Back" chuck for those applications requiring the workpiece to be "pulled back" against the chuck face or optional workstops.

Key Features

  • Wedge Style Power Chuck, Made in USA by Buck Forkardt
  • Available as 2-Jaw or 3-Jaw version
  • Ajust-Tru® precision mounting plus 100% more gripping power than conventional chucks!
  • Angular jaws on wider, longer keyways, plus a heavy duty wedge offer the strength and rigidity needed for maximum gripping power from the beginning to the end of jaw travel.
  • Larger tapped holes in master jaws to prevent bolt stretch.
  • Excellent for single or multiple spindle machines making heavy cuts on precision work.
  • The top jaws of the Pull Back chuck incorporate a unique locking cap screw. An internal set screw compresses a locking medium through a side port in the cap screw to prevent rotation and maintain integrity of top jaws through repeated cycles.
  • Master jaws recede into chuck face (pull back).
Technical Data
Chuck Size → 6 8 10 12 15 18 21 24
Max RPM 3000 2500 2000 1700 1400 1100 1000 900
Max Drawbar Pull Lbs (3-Jaw) 6000 10000 15000 18000 25000 25000 25000 25000
Est. Ship Weight* 26 55 92 133 218 331 570 748

*Estimated Ship Weight includes Mounting Plate

Chuck Size ® 6 8 10 12 15 18 21 24
B-1 6.50 8.25 10 12 15 18 21 24
B-3 4.78 6.16 7.91 7.91 11.78 11.78 16.03 16.03
B-4 .75 .88 .88 .88 1.25 1.25 2.00 2.00
B-5 .63 .66 .88 .88 .94 .94 1.19 1.19
B-6 2.06 2.63 2.63 3.38 4.63 4.63 6.50 6.50
B-7 .469 .53 .53 .66 .78 .78 .94 .94
B-15 3.06 3.75 4.72 5.13 5.50 6.00 7.94 7.94
B-23 .625"-18 .625"-18 1"-14 1"-14 1"-14 1"-14 1"-14 1"-14
B-28 1.25 1.75 2.66 2.66 2.25 1.50 1.75 1.75
B-32 2.25 2.53 3.69 3.69 3.19 2.69 4.00 4.00
B-35 1.13 1.28 1.69 1.69 1.69 1.69 2.28 2.28
MJ-2 1.50 1.75 2.13 2.50 3.00 3.00 3.00 3.00
MJ-5 .50 .50 .75 .75 .75 .75 .75 .75
MJ-8 .31 --- --- --- --- --- --- ---
MJ-10 Open .31 .31 .34 .38 .58 .58 .58 .58
MJ-10 Closed .16 .16 .16 .19 .38 .31 .31 .31
JN-12 .437"-14 .75"-16 .875"-14 .875"-14 1"-14 1"-14 1"-14 1"-14
Cross Keys 1 1 1 1 1 2 2 3
MJ-28 Max* 2.44 3.06 3.81 4.50 5.63 5.63 7.13 7.13
Jaw Travel .25 .28 .37 .37 .37 .37 .50 .50
  • Specifications subject to change without notice
  • Cross key closest to centerline of chuck
  • Dimensions in inches
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