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Home $ Product $ Power Chucks $ Pratt Burnerd / SYSTEC MK4 3-Jaw Self-Contained Air Power Chucks & Accessories

Pratt Burnerd / SYSTEC 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

 

MKIV Manual

MK4 Self-Contained Air Power Chucks
Available in A, D, L, Threaded and Custom Mounts.
Chuck Size3-Jaw Part #2-Jaw Part #4-Jaw Part #
5" (1/16" x 90 serrations)9730-013109720-01310Not Available
5" (1.5 x 60 serrations)9730-013239720-01323Not Available
6" (1/16" x 90 serrations)9730-017109720-01710Not Available
6" (1.5 x 60 serrations)
9730-017239720-01723Not Available
8" (1/16" x 90 serrations)9730-021109720-021109740-02110
8" (1.5 x 60 serrations)9730-021239720-021239740-02123
10" (1/16" x 90 serrations)9730-021609720-021609740-02160
10" (1.5 x 60 serrations)9730-026239720-026239740-02623
12" (1/16" x 90 serrations)9730-032109720-032109740-03210
12" (1.5 x 60 serrations)9730-032239720-032239740-03223
Table Mount, “L” Type Mounts and Special Mounts available upon request.
Dimensional and Technical Data (in inch)
Chuck SizeABCDEFMtg. BoltsMtg. Bolt
Circle		Wt. Lbs.Max rpm*Radial
Jaw Travel		OD Gripping Range
Std. Hard Jaws
(not included)		ID Gripping Range
Std. Hard Jaws
(not included)		Gripping
Force
Lbs.**
5"5.354"8.0315"4.8031"1.260"4.7244"0.2559"M6x70 (6)6.2795"3145000.1181"NANA5,845
6"6.693"9.9213"5.0394"1.535"6.1024"0.2559"M8x75 (8)8.0906"5145000.1575".63" to 7.09"2.80" to 7.80"10,566
8"8.465"11.4961"5.3150"2.047"7.6772"0.2559"M8x75 (8)9.6654"7736000.1575".98" to 8.62"3.58" to 9.58"15,737
10"10.236"13.1890"6.0236"3.622"9.2520"0.2559"M10x90 (8)11.2795"11235000.1969"1.22" to 10.71"4.45" to 11.39"18,659
12"12.402"14.2520"6.4961"4.528"9.2520"0.2559"M10x140 (8)12.3031"15425000.1969"1.57" to 13.35"5.31" to 14.69"20,458
*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).