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MK4 3-Jaw Self-Contained Air Power Chucks & Accessories

  • One-year warranty
  • Precision manufactured to fit types A and D spindles and adapter mounting
  • Repetitive gripping within .001″ TIR
  • Safe, Chuck operates independently of air supply when gripping
  • No separate actuating cylinder
  • No draw tube to restrict thru-hole
  • Sizes 5″, 6-1/2″, 8″, 10″, and 12″
  • Suitable for chucking or barwork
  • Less overhang. Lighter in weight
  • Minimum maintenance
  • Quick, simple Lever or Foot Pedal Operation
  • Easy installation
  • Optional top jaws
  • 1.5X60° & 1/16″ x 90° serrated master jaws available with T-nut
  • Available in 2 Jaw, 3 Jaw and 4 Jaw configurations.

See our MK4 Accessories and Installation information below

MK4 3-Jaw Self-Contained Air Power Chucks
Available with Type D SpindlesAvailable with Type A Spindles
Chuck SizeAdapter Mount Model No.Spindle SizeSpindle Size
5"9730-01310
9730-01323
D-3
D-4A-4
D-5A-6
D-6A-6
6-1⁄2"9730-01710 1/16X90
9730-01723 1.5X60
D-3
D-4
D-5A-5
D-6A-6
8"9730-02110 1/16X90
9730-02123 1.5X60
D-4
D-5A-5
D-6A-6
10"9730-02610 1/16X90
9730-02623 1.5X60
D-5
D-6A-6
D-8A-8
12"9730-03210 1/16X90
9730-03223 1.5X60
D-8A-8
D-11A-11
Table Mount, “L” Type Mounts and Special Mounts available upon request.
Dimensional and Technical Data (in inch)
Chuck SizeABCDEFMtg Hole8-Hole B.C.Wt. LbsMax rpm*Jaw TravelExt. Gripping Range Std. Hard JawsInt. Gripping Range Std. Hard JawsForce**
55.358.034.81.264.7240.2559M66.28
6 Bolts
3148500.11815845
6-1⁄26.699.925.041.536.1020.2559M88.09065145000.1575.63 to 7.092.80 to 7.8010566
88.4611.495.322.057.6770.2559M89.66547736000.1575.98 to 8.623.58 to 9.5815737
1010.2313.196.023.629.2520.2559M1011.279511235000.19691.22 to 10.714.45 to 11.3918659
12-1⁄212.414.256.494.539.2520.2559M1012.303115425000.19691.57 to 13.355.31 to 14.6920458
*Max. RPM at 85 PSI with standard hard top jaws. Consult factory for increased RPM rating.
** Total Gripping Force (lbs) at 85 PSI
Lever Control Unit — Part Number 1157-12800
Foot Pedal Control Unit —Part Number 1157-12801 (Not Shown)
This unit is essential in order to operate MK4 Self-Contained Power Chucks. It is designed to be interlocked with the machine spindle so that the chuck cannot be actuated while the spindle is under power. Care must be taken not to actuate the chuck while the spindle is decelerating.

Units are supplied complete with pressure gage, pressure regulator, oil mist lubricator, air filter and lines with fittings.

Unit is operated by air and 110 volt/60 cycle (24 volt DC on request).