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Pratt Burnerd/Atlas 4-Jaw Independent Iron Body Chucks Series 441 Medium-Duty Value Line, Sizes 5" thru 32"
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4-Jaw Independent Iron Body Chucks
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| Type D Spindle | Type A Spindle | ||||
| Chuck Size | Flatback Chuck No. | Size | Chuck No. | Size | Chuck No. |
| 5" | 0544-1000 | ||||
| 6" | 0644-1000 | D-3 | 0644-10D3 | ||
| 6" | D-4 | 0644-10D4 | |||
| 8" | 0844-1000 | D-3 | 0844-10D3 | ||
| 8" | D-4 | 0844-10D4 | |||
| 8" | D-5 | 0844-10D5 | A-5 | 0844-10A5 | |
| 10" | 1044-1000 | D-5 | 1044-10D5 | A-5 | 1044-10A5 |
| 10" | D-6 | 1044-10D6 | A-6 | 1044-10A6 | |
| 12" | 1244-1000 | D-6 | 1244-10D6 | A-6 | 1244-10A6 |
| 12" | D-8 | 1244-10D8 | A-8 | 1244-10A8 | |
| 16" | 1644-1000 | D-8 | 1644-10D8 | A-8 | 1644-10A8 |
| 16" | D-11 | 1644-1D11 | A-11 | 1644-1A11 | |
| 18" | 1844-1000 | D-8 | 1844-10D8 | A-8 | 1844-10A8 |
| 18" | D-11 | 1844-1D11 | A-11 | 1844-1A11 | |
| 20" | 2044-1000 | D-8 | 2044-10D8 | A-8 | 2044-10A8 |
| 20" | D-11 | 2044-1D11 | A-11 | 2044-1A11 | |
| 24" | 2444-1000 | D-8 | 2444-10D8 | A-8 | 2444-10A8 |
| 24" | D-8 | 2444-1D11 | A-11 | 2444-1A11 | |
| 32" | 3244-1000 | D-11 | 3244-1D11 | A-11 | 3244-1A11 |
| 32" | D-15 | 3244-1D15 | A-15 | 3244-1A15 | |
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Contact PBA for price and availability for “L” type mounted
chucks
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| Dimensional Data | |||||||||
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Dimensional Data 4-Jaw Independent Iron Body Chucks (in/mm)
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| Chuck Dia. | B1 | B3 | B4 | B5 | B6 | B7 | B9 | B15 | J10 |
| 6"/160 | 6.30"/160 | 2.56"/65 | 1.77"/45 | .197"/5 | 3.74"/95 | (4) M-10 | 2.36"/96.5 | 2.56"/65 | 1.24"/31.5 |
| 8"/200 | 7.87"/200 | 4.92"/125 | 1.97"/50 | .236"/6 | 4.11"/104.5 | (4) M-10 | 4.33"/110 | 2.95"/75 | 1.37"/35 |
| 10"/250 | 9.84"/250 | 4.33"/110 | 2.56"/65 | .236"/6 | 4.72"/120 | (4) M-12 | 4.62"/117.5 | 3.29"/82 | 1.39"/35.5 |
| 12"/315 | 12.40"/315 | 5.51"/140 | 3.74"/95 | .236"/6 | 6.49"/165 | (4) M-16 | 5.27"/134 | 3.54"/90 | 1.73"/44 |
| 16"/400 | 15.75"/400 | 6.30"/160 | 4.92"/125 | .315"/8 | 7.28"/185 | (4) M-16 | 5.63"/143 | 3.74"/95 | 1.89"/48 |
| 18"/450 | 17.71"/450 | 7.08"/180 | 5.51"/140 | .315"/8 | 8.07"/205 | (4) M-16 | 5.79"/147 | 3.94"/100 | 1.85"/47 |
| 20"/500 | 19.68"/500 | 7.87"/200 | 6.30"/160 | .315"/8 | 9.29/236 | (4) M-20 | 6.39"/161 | 4.17"/106 | 2.16"/55 |
| 24"/630 | 24.80"/630 | 8.66"/220 | 7.08"/180 | .394"/10 | 10.26/258 | (4) M-20 | 7.06"/180 | 4.64"/118 | 2.56"/65 |
| 32"/800 | 31.49"/800 | 9.84"/250 | 8.26"/210 | .472"/12 | 10.26/258 | (8) M-20 | 7.95"/202 | 5.19"/132 | 2.76"/65 |
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Note: Dimensions are for flatback-mounted chucks; on A, L and D
mounted chucks dimension B15 will vary.
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