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Pratt Burnerd Quick-Change 2-Jaw Power Chucks
2-JAW QUICK JAW CHANGE_edited.png

MADE IN USA

Constant Grip High Speed Thru-Hole Power Chucks

Jaw Presetting Fixture Order number 1009-07090 for use with 6″, 8″, 10″, 12″, 15″, 18″ and 20″ sizes Standard Bore and King Bore Models Quick Change Jaw Power Chucks.

  • MADE IN USA

  • One Year Warranty

  • ±.0005″ Repeatability

  • 4-Point Adjusting Feature in the chuck body allows you to true up to virtually zero. Increase Soft Jaw Life by using the adjustment feature instead of skim cutting soft jaws as often. 6 points on 15″ chucks and larger

  • High RPM … up to 6,000 using standard top jaws … without loss of gripping force, due to internally counter-balanced design.

  • Quick Change Master Jaws, 2 sets supplied with each chuck permits offline pre-assembly of top tooling for next job reducing traditional setup time by 95%.

  • SAFE Visual Indicator shows when Master Jaws are in the unlocked mode.

  • Master jaws available in 1.5mm x 60° (Japanese type), 1/16″ x 90°, Acme serration and square serration, American Standard tongue and groove.

  • Utilize existing top tooling by selecting style of master jaws from 1.5 x 60,1/16″ x 90, Am. Std. Acme, Am. Std Tongue & Groove and Square Serrations or substitute mono block jaws. Sets can be mixed styles.

  • Large Thru-Hole Capacity

  • Utilize the machine’s existing actuating cylinder – including Japanese types.

  • Easy Installation – removable blank sleeve in the chuck allows the customer to bore and thread the sleeve of the chuck to match existing drawtube of drawbar. PBA can supply chuck sleeve pre-threaded on request, at a nominal charge.

  • Optional Jaw Setting Fixture for presetting top jaws off the machine for the next job, while the machine is still running. A real timesaver!

  • Sizes 6″, 8″, 10″, and 12″, diameters…other sizes available on request.

Chuck Size
Mount
RPM
Model No.*
Jaw Stroke
Sleeve Stroke
Thru Hole
Collet Pad Bar Capacity
Tooling Hole Size
Operating Force
Grip Force
Wt (lbs)
(D)Direct
lbs/f
lbs/f
(I)Indirect
6.5"
A2-4(I)
6000
9141-217__
.140"
.630"
1.65"
1.5"
5/16" UNC
2400
6600
31
6.5"
A2-5(D)
6000
9141-317__
.140"
.630"
1.65"
1.5"
5/16" UNC
2400
6600
31
6.5"
A2-6(I)
6000
9141-417__
.140"
.630"
1.65"
1.5"
5/16" UNC
2400
6600
31
8.25"
A2-5(I)
5500
9141-321__
.140"
.630"
2.05"
2.0"
5/16" UNC
4100
10000
53
8.25"
A2-6(D)
5500
9141-421__
.140"
.630"
2.05"
2.0"
5/16" UNC
4100
10000
53
8.25"
A2-8(I)
5500
9141-521__
.140"
.630"
2.05"
2.0"
5/16" UNC
4100
10000
53
10.0"
A2-6(I)
5000
9141-426__
.160"
.730"
2.56"
2.5"
3/8" UNC
4800
13200
82
10.0"
A2-8(D)
5000
9141-526__
.160"
.730"
2.56"
2.5"
3/8" UNC
4800
13200
82
12.0"
A2-8(I)
4200
9141-531__
.160"
.730"
3.54"
3.0"
3/8" UNC
6600
18000
150
12.0"
A2-11(D)
4200
9141-631__
.160"
.730"
3.54"
3.0"
3/8" UNC
6600
18000
150
TECHNICAL SPECIFICATIONS
Chuck Size
A
B
C
D
F
Max
Min
6-A4
6.5
4.685
4.803
3.25
0.787
2.126
1.339
6-A5
6.5
4.842
4.96
4.125
0.787
2.126
1.339
6-A6
6.5
5.078
5.196
5.25
0.787
2.126
1.339
8-A5
8.25
5.119
5.275
4.125
1
2.637
1.733
8-A6
8.25
5.354
5.51
5.25
1
2.637
1.733
8-A8
8.25
5.705
5.862
6.75
1
2.637
1.733
10-A6
10
5.511
5.669
5.25
1.181
3.268
2.087
10-A8
10
5.905
6.063
6.75
1.181
3.268
2.087
12-A8
12
6.614
6.771
6.75
1.181
4.291
2.362
12-A11
12
6.614
6.771
9.25
1.181
4.291
2.362
ADDITIONAL TECHNICAL SPECIFICATIONS
Chuck Size
G
H
J
K
Min
Max
S
W
6-A4
M10x25(6)
M10x25
5/16 UNFx1/2
2.99
0.94
1.57
0.475
1.22
6-A5
M10x130(4)
M10x25
5/16 UNFx1/2
2.99
1.1
1.73
0.475
1.22
6-A6
M12x30(6)
M10x25
5/16 UNFx1/2
2.99
1.5
2.13
0.475
1.22
8-A5
M10x30(6)
M12x35
3/8 UNFx3/4
3.94
0.98
1.61
0.551
1.57
8-A6
M12x130(4)
M12x35
3/8 UNFx3/4
3.94
1.19
1.81
0.551
1.57
8-A8
M16x30(6)
M12x35
3/8 UNFx3/4
3.94
2.02
2.65
0.551
1.57
10-A6
M12x35(6)
M12x35
1/2 UNFx3/4
4.53
1.02
1.75
0.63
1.57
10-A8
M16x150(4)
M12x35
1/2 UNFx3/4
4.53
1.44
2.15
0.63
1.57
12-A8
M16x40(6)
M14x45
1/2 UNFx3/4
5.71
1.3
2.03
0.71
1.81
12-A11
M16x160(4)
M14x45
1/2 UNFx3/4
5.71
1.3
2.03
0.71
1.81

(T) Draw Tube Thread Blank
1. Dimensions listed are with 1.5 x 60° Japanese type master jaws. Some dimensions will vary using other Master Jaw types such as Acme, 1/16" x 90° or Am. Std. Tongue & Groove.
2. Chuck is at mid stroke with master jaws flush with the body O.D.
3. UNC mounting bolts available upon request.

QUICK CHANGE JAW CHOICES
JAW CHOICES
6 INCH
8 INCH-1
10 INCH-2
12 INCH-3
15 INCH-4
18 INCH-5
20 INCH-6
24 INCH-7
1.5mm x 60 Fine Serration
8130-17623
8130-21623
8130-26623
8130-31623
8130-40623
8130-46623
8130-50623**
8130-61623**
1/16 x 90 Fine serration
8130-17610
8130-21610
8130-26610
8130-31610
8130-38610*
8130-46610*
8130-50610*
8130-61610*
Acme Serration
N/A
8130-21626
8130-26626
8130-31626
8130-40626
8130-46626
8130-50626
8130-61626
American Tongue & Groove
8130-17607
8130-21607
8130-26607
8130-31607
8130-38607
8130-46607
8130-50607
8130-61607
Square Serration
N/A
8130-21627
8130-26627
8130-31627
8130-38627
8130-46627
8130-50627
8130-61627
Mono Block Jaw:
8130-17601P
8130-21601
8130-26601
8130-31601
8130-38601
8130-46601
8130-50601
8130-61601
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