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PRATT BURNERD/3-JAW VALUE LINE CAST IRON SCROLL CHUCKS
PRATT-ATLAS-3-JAW VALUE LINE CHUCK.png

Atlas Value-Line Series 342 Medium-Duty Flat-back Scroll Chuck, D and A Type Mounting: Sizes 5″ thru 25″

  • High value and lower cost

  • One year warranty

  • Standard chuck sizes 5″ thru 25″

  • Maximum .003″ TIR using nominated pinion – thru 12″

  • .001″ repeatability using nominated pinion – thru 12″

  • Two-piece American Standard tongue and groove jaws

  • Hardened scroll

  • Three hardened pinions

Chuck Size
B1
B3
B4
B5
B6
B7
B9
B10
B15
Max RPM
5
4.92
3.74
1.18
0.157
4.25
(3) M-8
3.94
1.65
2.28
3000
6
6.3
4.92
1.77
0.197
5.51
(6) M-10
4.53
1.97
2.56
2500
8
7.87
6.3
2.56
0.197
6.93
(6) M-10
5
2.05
2.95
2000
10
9.84
7.87
3.15
0.197
8.81
(6) M-12
5.59
2.44
3.15
1600
12
12.4
10.23
3.94
0.236
11.26
(6) M-16
6.5
3.15
3.54
1200
16
15.75
12.99
5.12
0.236
14.25
(6) M-16
7.32
3.38
3.94
1000
20
19.68
16.53
8.26
0.236
18.03
(6) M-16
8.07
3.54
4.53
800
25
24.8
21.45
9.92
0.275
23.07
(6) M-16
8.68
3.36
5.31
800
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