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Pratt Burnerd Super-Precision 3-Jaw Scroll Chucks

Pratt Burnerd America Super-Precision, 3 Pinion Non-Adjustable
Self-Centering Type: 234 and 235 Series 5″ thru 15″

• Two-year warranty
• Precision manufactured to fit types A, D and L spindles and adapter mounting
• .0015″ T.I.R. 6-12″ sizes .003″ T.I.R. 15″ using the nominated pinion
• Repeatability .0005″ on all sizes
• Sizes 5″ thru 15″
• Three hardened pinions
• Two-piece American standard tongue and groove jaws
• High tensile ductile iron bodies

Self-Centering High Quality 3 Jaw Universal Chucks
Chuck SizeAdapter
Mounting
Model No.		Type A Spindle
Short Taper		Type D Spindle
Camlock		Type L Spindle
Long Taper
SizeModel No.SizeModel No.SizeModel No.
50523500--D-30523520--
5---D-40523521--
60623500A-50623510D-30623520L-000623531
6---D-40623521L-00623532
80823500A-50823510D-30823520L-000823531
8-A-60823511D-40823521L-00823532
8---D-50823522--
8---D-60823523L-10823533
101023500A-51023510D-41023521L-001023531
10-A-61023511D-61023523L-01023532
10-A-81023512D-81023524L-11023533
121223500A-61223511D-61223523L-01223532
12-A-81223512D-81223524L-11223533
12---D-111223525L-21223534
151523400A-81523412D-61523423L-11523433
15-A-111523413D-81523424L-21523434
15---D-111523425-
Larger diameter chucks available, contact PBA for price and delivery.
Dimensional Data for 235 Series Adapter Mounting Self-Centering Chucks
Gripping Capacity
Chuck SizeABCDEFGHKLbs. Wt.Min.Max.Max. RPM
5"4.92"3.740"1.38"2.24"0.75"0.16"4.25"6.75"M89.703/16"4"5000
6"6.30"4.921"1.81"2.52"0.91"0.17"5.51"7.75"M1018.003/16"6"4900
8"7.87"6.299"2.16"2.92"1.14"0.17"6.93"9.75"M1032.403/16"7"4200
10"9.84"7.875"2.99"3.24"1.30"0.21"8.82"12.25"M1253.111/2"9"3300
12"12.20"10.236"4.13"3.56"1.57"0.20"11.26"14.25"M1294.553/4"11"2700
15"15.74"12.992"5.35"3.96"1.69"0.33"14.25"16.25"M16171.001-1⁄2"15"2000
Mounting Plates For 234 and 235 Series Chucks
Mounting plates are precision machined to suit the spindle nose of your machine. Plates are stocked semi-finished. If ordering the plate separately, specify the model number of your chuck so that PBA can finish machine the adapter to suit your Pratt Burnerd chuck.
Type D Camlock Mountings
Spindle5"6"8"10"12"15"
D-30503020060302008030201003020--
D-40503021060302108030211003021--
D-5--08030221003022--
D-6--0803023100302312030231503023
D-8---100302412030241503024
D-11----12030251503025
Type A American Standard Short Taper A1 & A2 Spindles
Spindle5"6"8"10"12"15"
A-50503010060301008030101003010--
A-6--0803011100301112030111503011
A-8---100301212030121503012
A-11----12030131503013
Type L American Standard Long Taper Key Drive Spindles
Spindle5"6"8"10"12"15"
L-000503031060303108030311003031--
L-0-0603032080303210030321203032-
L-1--0803033100303312030331503033
L-2---100303412030341503034
L-3-----1503035
Threaded Spindles
Spindle5"6"8"10"
1-1⁄2"-8050304106030410803041-
1-3⁄4"-8050304206030420803042-
2-1⁄4"-80503043060304308030431003043
Special adapter plates available upon request. Specify chuck number and spindle nose specifications.
For spindle nose specifications, see our pdf catalog.