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Pratt Burnerd Quick-Change Jaw Grip Fast Power Chucks, Standard and King Bore

MADE IN USA

PBA Constant Grip High Speed Thru-Hole Power Chucks, Sizes 6″ Thru 24″

Shown with optional jaw setting fixture and hard reversible top jaws.
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.
One Year Warranty

  • MADE IN USA
  • ±.0005″ Repeatability
  • 3-Point Adjusting Feature in the chuck body permits indicating in to zero.
  • Increase Soft Jaw Life by using adjustment feature. Reduce or eliminate re-boring of Soft Jaws.
  • 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.
  • 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.
  • Doubles as collet chuck as master jaws have keyed radius in front that accept standard W & S collet pads. Eliminate time wasted on switching over to collet chuck.
  • Large Thru-Hole Capacity.
  • Utilize the machine’s existing actuating cylinder – does not require long stroke cylinder.
  • Easy Installation – removable blank sleeve in the chuck allows the customer to bore and thread the sleeve of the chuck to match existing drawtube or drawbar. PBA can supply chuck sleeve prethreaded on request, at a nominal charge.
  • Optional Jaw Setting Fixture (as shown) for presetting top jaws off the machine for the next job, while the machine is still running. A real timesaver!
  • Sizes 6″, 8″, 10″, 12″, 15″, 18″, 20″ and 24″ diameters.

 

QUICK CHANGE MANUAL 2021

Chuck
Size		Mount
(D)Direct
(I)Indirect		RPMModel NumberJaw
Stroke		Sleeve
Stroke		Thru
Hole		Collet
Pad Bar
Capacity		Tooling Hole
Size		Operating
Force
lbs/f		Grip
Force
lbs/f		Wt (lbs)
6.5"A2-4(I)60009131-217**.140".630"1.65"1.5"5/16" UNC3600990031
6.5"A2-5(D)60009131-317**.140".630"1.65"1.5"5/16" UNC3600990031
6.5"A2-6(I)60009131-417**.140".630"1.65"1.5"5/16" UNC3600990031
8.25"A2-5(I)55009131-321**.140".630"2.05"2.0"5/16" UNC54001500053
8.25"A2-6(D)55009131-421**.140".630"2.05"2.0"5/16" UNC54001500053
8.25"A2-8(I)55009131-521**.140".630"2.05"2.0"5/16" UNC54001500053
10.0"A2-6(I)50009131-426**.160".730"2.56"2.5"3/8" UNC72001980082
10.0"A2-8(D)50009131-526**.160".730"2.56"2.5"3/8" UNC72001980082
12.0"A2-8(I)42009131-531**.160".730"3.54"3.0"3/8" UNC990027000150
12.0"A2-11(D)42009131-631**.160".730"3.54"3.0"3/8" UNC990027000150
15.0"A2-8(I)30009131-538**.200".790"4.92"4.5"3/8" UNC1350031500280
15.0"A2-11(D)30009131-638**.200".790"4.92"4.5"3/8" UNC1350031500280
18.0"A2-8(I)25009131-546**.236".984"5.59"5.5"1/2" UNC1550038250375
18.0"A2-11(I)25009131-646**.236".984"5.59"5.5"1/2" UNC1550038250375
20.0"A2-11(I)25009131-650**.236".984"5.59"5.5"1/2" UNC1550038250550
24.0"A2-11(I)20009131-661**.315".984"6.299"6.0"1/2" UNC2070038250760
24.0"A2-15(D)20009131-761**.315".984"6.299"6.0"1/2" UNC2070038250760
King Bore Quick-Change Chucks
7.0"A2-5(D)70009171-317**.140".630"2.20"2.0"5/16" UNC45001300037
8.25"A2-6(D)55009171-421**.140".630"2.59"2.5"5/16" UNC54001500053
10.43"A2-6(I)50009171-426**.160".730"3.03"3.0"3/8" UNC72001980082
10.43"A2-8(D)50009171-526**.160".730"3.03"3.0"3/8" UNC72001980082
12.40"A2-8(I)42009171-531**.160".730"4.05"4.0"3/8" UNC990027000183
12.40"A2-8(D)42009171-631**.160".730"4.05"4.0"3/8" UNC990027000183
*Insert last two digits for Master Jaw type...Example 9131-21723...Indicates 1.5mm x 60°: Master Jaw Required
Use 23 for 1.5mm x 60° Japanese type.** Use 07 for Am. Std Tongue & Groove. Use 10 for 1/16 X 90° Serrations.*
Use 26 for Acme Serration. Use 27 for Square Serration.
NOTE: 18, 20" & 24" dia. chucks require separate collet pad master jaws: 18"-#8130-46696, 20"-#8130-50696 & 24"-#8130-61696.
HOW TO ORDER: State quantity, Model Number of chuck, Machine Make & Model, and shipping instructions.
Standard Bore Dimensional and Performance Data (in inch)
E
Standard Bore
Chuck Size		ABCDFMaxMin
6-A46.4964.6854.8033.250.7872.1261.339
6-A56.4964.8424.964.1250.7872.1261.339
6-A66.4965.0785.1965.250.7872.1261.339
8-A58.265.1195.2754.12512.6371.733
8-A68.265.3545.515.2512.6371.733
8-A88.265.7055.8626.7512.6371.733
10-A6105.5115.6695.251.1813.2682.087
10-A8105.9056.0636.751.1813.2682.087
12-A8126.6146.7716.751.1814.2912.362
12-A11126.6146.7719.251.1814.2912.362
15-A8156.9297.0866.751.69353.228
15-A11156.9297.0869.251.69353.228
18-A8187.727.786.751.6936.7724.527
18-A11187.727.789.251.6936.7724.527
20-A1119.687.3627.4999.252.3628.095.059
24-A1124.027.567.729.252.36210.095.77
24-A1524.027.567.72132.36210.095.77
***9.45"/13"/16.53"/20.08"
(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.
Standard Bore Dimensional and Performance Data (in inch)
L
Standard Bore
Chuck Size		GHJKMinMaxSW
6-A4M10x25(6)M10x255⁄16 UNFx1⁄22.990.941.570.4751.22
6-A5M10x130(3)M10x255⁄16 UNFx1⁄22.991.11.730.4751.22
6-A6M12x30(6)M10x255⁄16 UNFx1⁄22.991.52.130.4751.22
8-A5M10x30(6)M12x353⁄8 UNFx3⁄43.940.981.610.5511.57
8-A6M12x130(3)M12x353⁄8 UNFx3⁄43.941.191.810.5511.57
8-A8M16x30(6)M12x353⁄8 UNFx3⁄43.942.021.750.5511.57
10-A6M12x35(6)M12x351⁄2 UNFx3⁄44.531.022.150.631.57
10-A8M16x150(3)M12x351⁄2 UNFx3⁄44.531.412.030.631.57
12-A8M16x40(6)M14x451⁄2 UNFx3⁄45.711.32.030.711.81
12-A11M20x160(3)M14x451⁄2 UNFx3⁄45.711.32.030.711.81
15-A8M16x35(6)M20x551⁄2 UNFx3⁄4473/7891.382.160.8662.36
15-A11M20x180(6)M20x551⁄2 UNFx3⁄4473/7891.382.360.8662.36
18-A8M16x40(6)M20x551⁄2 UNFx3⁄4433/6301.382.360.9842.36
18-A11M20x35(6)M20x551⁄2 UNFx3⁄4433/6301.382.360.9842.36
20-A11M20x45(6)M20x351⁄2 UNFx3⁄4705/9941.382.360.9842.36
24-A11M20x45(6)M20x351⁄2 UNFx3⁄4***1.572.560.9842.36
24-A157/8-9x8(6)M20x351⁄2 UNFx3⁄4***1.572.560.9842.36
***9.45"/13"/16.53"/20.08"
(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.
Mono block jaws are extremely accurate solid one piece design ideal for dedicated jobs, and will allow you to work closer to the chuck face, due to no jaw bolt obstructions. For longer service Mono Block Jaws are made from a nitride hardening material to allow hardening after forming without major distortion.
See our product catalog for dimensions.
Extra Sets of Master Jaws for Quick Change Jaw Power Chucks
6"8"10"12"15"18"20"24"
Master Jaw Type -
1.5mm x 60°Fine Serration
(Japanese Type)		8130-176238130-216238130-266238130-316238130-406238130-466238130-50623**8130-61623**
1/16 x 90° Fine serration
(European Type)		8130-176108130-216108130-266108130-316108130-38610*8130-46610*8130-50610*8130-61610*
Acme SerrationN/A8130-216268130-266268130-316268130-406268130-466268130-506268130-61626
American Std.
Tongue & Groove		8130-176078130-216078130-266078130-316078130-386078130-466078130-506078130-61607
Square SerrationN/A8130-216278130-266278130-316278130-386278130-466278130-506278130-61627
Mono Block Jaw:
***Also available in long pointed
design		8130-17601P8130-216018130-266018130-316018130-386018130-466018130-506018130-61601
**3.0mm x 60 degree serrations
*3/32" x 90 degree serrations
Contact us for our King-Bore Master Jaw Set part #'s as they are different than our Standard Bore Jaws.