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Pratt Burner/Atlas Series 144 Medium-Duty and Series 145 Heavy-Duty 4 Jaw Independent Chucks
Medium Duty-144 Series
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4-Jaw High Quality Independent Chucks
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| Chuck Size | Adapter Mounting |
Type A Spindle Short Taper |
Type D Spindle Camlock |
Type L Spindle Long Taper |
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| Model No. | Size | Model No. | Size | Model No. | Size | Model No. | |
| 6 | 0614400 | - | - | D-3 | 0614420 | L-00 | 0614431 |
| 6 | - | - | - | D-4 | 0614421 | L-0 | 0614433 |
| 8 | 0814400 | A-5 | 0814410 | D-3 | 0814420 | L-00 | 0814431 |
| 8 | - | - | - | D-4 | 0814421 | L-0 | 0814432 |
| 8 | - | - | - | - | - | L-1 | 0814433 |
| 10 | 1014400 | A-5 | 1014410 | D-4 | 1014421 | L-00 | 1014431 |
| 10 | - | - | - | D-5 | 1014422 | - | - |
| 10 | - | A-6 | 1014411 | D-6 | 1014423 | L-0 | 1014432 |
| 10 | - | A-8 | 1014412 | D-8 | 1014424 | L-1 | 1014433 |
| 12 | 1214400 | A-6 | 1214411 | D-6 | 1214423 | L-0 | 1214432 |
| 12 | - | A-8 | 1214412 | D-8 | 1214424 | L-1 | 1214433 |
| 14 | 1414500 | A-6 | 1414511 | D-6 | 1414523 | L-1 | 1414533 |
| 14 | - | A-8 | 1414512 | D-8 | 1414524 | L-2 | 1414534 |
| 16 | 1614500 | A-8 | 1614512 | D-8 | 1614524 | L-1 | 1614533 |
| 16 | - | A-11 | 1614513 | D-11 | 1614525 | L-2 | 1614534 |
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Larger diameter chucks available, contact us for price and
delivery.
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| Dimensional Data | ||||||||||||||
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Dimensional Data for Adapter Mounting Chucks
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| Chuck Size | Gripping Capacity | Wt. | ||||||||||||
| A | B | C | D | E | F | G | H | J | K | L | Min. | Max. | lbs | |
| 6" | 6.30" | 4.921" | 1.77" | 2.12" | .87" | .16" | 5.512" | .94" | M10 | M10 | 7-1⁄8" | 5/16" | 5" | 16 |
| 8" | 7.87" | 4.921" | 1.97" | 2.83" | 1.22" | .16" | 5.512" | 1.26" | M10 | M10 | 9-1⁄4" | 5/16" | 7" | 31 |
| 10" | 9.84" | 7.874" | 2.36" | 2.83" | 1.22" | .19" | 8.819" | 1.26" | M12 | M12 | 12" | 1/2" | 8" | 43 |
| 12" | 12.40" | 7.874" | 2.95" | 3.15" | 1.42" | .19" | 8.819" | 1.42" | M12 | M12 | 14" | 1/2" | 10" | 72 |
| 14" | 13.80" | 10.236" | 2.95" | 3.58" | 1.47" | .19" | 11.26" | 1.42" | - | M12 | 16" | 3/4" | 12" | 126 |
| 16" | 15.75" | 10.236" | 4.05" | 3.58" | 1.47" | .19" | 11.26" | 1.42" | - | M12 | 18" | 3/4" | 14" | 180 |
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Mounting Plates for 144 and 145 Series Independent Chucks
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Mounting plates are precision machined to suit the spindle nose
of your machine. Plates are stocked semi-finished. If ordering
plate separately, specify the model number of your chuck so that
PBA can finish machine the adapter to suit your Pratt Burnerd
chuck.
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Type D Camlock Mountings
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| Spindle | 6" | 8" | 10" | 12" | 14" | 16" |
| D-3 | 0603020 | 0603020 | 1003020 | 1003020 | - | - |
| D-4 | 0603021 | 0603021 | 1003021 | 1003021 | - | - |
| D-5 | 0603022 | 0603022 | 1003022 | 1003022 | 1203022 | - |
| D-6 | - | 0603023 | 1003023 | 1003023 | 1203023 | 1203023 |
| D-8 | - | - | 1003024 | 1003024 | 1203024 | 1203024 |
| D-11 | - | - | - | - | 1203025 | 1203025 |
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Type A American Standard Short Taper A1 &
A2 Spindles
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| Spindle | 6" | 8" | 10" | 12" | 14" | 16" |
| A-5 | 0603010 | 0603010 | 1003010 | - | - | - |
| A-6 | 0603011 | 0603011 | 1003011 | 1003011 | - | - |
| A-8 | - | - | 1003012 | 1003012 | 1203012 | 1203012 |
| A-11 | - | - | - | - | 1203013 | 1203013 |
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Type L American Standard Long Taper Spindles
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| Spindle | 6" | 8" | 10" | 12" | 14" | 16" |
| L-00 | 0603031 | 0603031 | 1003031 | - | - | - |
| L-0 | 0603032 | 0603032 | 1003032 | 1003032 | 1203032 | - |
| L-1 | - | - | 1003033 | 1003033 | 1203033 | 1203033 |
| L-2 | - | - | 1003034 | 1003034 | 1203034 | 1203034 |
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Threaded Spindles
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| Spindle | 6" | 8" | 10" | |||
| 1-1⁄2" - 8 | 0603041 | 0603041 | - | |||
| 1-3⁄4" - 8 | 0603042 | 0603042 | - | |||
| 2-1⁄4" - 8 | 0603043 | 0603043 | 1003043 | |||
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Hardinge 4° Taper Plate
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| Spindle | 6" | 8" | ||||
| 4° Taper | 0604044 | 0604044 | ||||
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Special adapter plates available upon request. Specify chuck
number and spindle nose specifications.
6", 8", 10" and 12" adapters are the same as 3 Jaw adapters. |
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