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Pratt Burnerd/Atlas Large Closed Center Adjustable Jaw Power Chucks for Vertical and Horizontal Lathes
LARGE 3-JAW CLOSED CENTER PWR CHK.png

40 – 79 inches

  • Ideal for Large vertical and Horizontal Lathe applications

  • Universal Wedge Design with manually adjustable Master Jaws

  • Available in 3, 4 and 6-Jaw configurations

  • Sealed front Master Jaw design for Vertical Use

  • High Speed Design

  • Available Mountings Straight Recess and ‘A’ Type Spindles

  • Contact Factory for application expertise and quotation

MODEL
V-240
VIT-240
V-250
VIT-250
VE-250
VIT-263
VE-263
VE-279
Number of Jaws
3
4
3
4
6
4
6
6
Plunge Stroke (in)
2.244
2.244
2.244
2.244
2.244
2.362
2.362
2.362
Radial Jaw Stroke (+ Manual Setting) (in)
.90+1.18
.90+1.18
.90+1.18
.90+1.18
.90+1.18
1.34+1.57
1.34+1.57
1.34+1.57
Pull Force (lbf)
40465
40465
40465
40465
40465
44961
44961
44961
Grip Force (lbf)
71938
71938
71938
71938
71938
80931
80931
80931
Oper. Pressure (psi)
610
610
610
610
610
670
670
670
Max. Speed (rpm)
630
550
500
400
360
300
280
230
Weight (lbs)
1422
1544
1962
2073
2140
3748
3969
6284
Mount of Inertia (kg-m2)
82
89
168
177
183
518
548
1350
Matching Cylinder
ALT250C
ALT250C
ALT250C
ALT250C
ALT250C
ALT250C
ALT250C
ALT250C
TECHNICAL SPECIFICATIONS
PRATATLAS 3J LRGDIA CLSCTR ADJUSTJAW PWRCHK TECSPEC DIM DWG.png
Model
A
B
C
D Max
H
J
K
L
M
40" V/VIT-240"
39.56
7.086
20.47
19.76
18.25
4.25
M24
M52x1.5
0.315
50" V/VIT/VE-250"
49.21
7.068
20.47
24.53
18.25
4.25
M24
M52x1.5
0.315
63" VIT/VE-263"
63
8.661
28.34
31.34
25.49
5.67
M30
M52x1.5
0.315
Dimensional Data (in inch)
Model
N Max.
O
P Max.
P Min.
Q
R
S
T
U
40" V/VIT-240"
17.992
1.181
2.323
0.078
0.157
7-M24
0.748
3.346
2.834
50" V/VIT/VE-250"
22.165
1.181
2.323
0.078
0.157
10-M24
0.748
3.346
2.834
63" VIT/VE-263"
29.055
1.575
3.228
0.866
0.236
13-M24
0.866
4.331
2.834
79" VE-279"
35.984
1.575
3.937
0.866
0.236
17-M24
0.866
4.331
2.834
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