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Pratt Burnerd/Atlas 4-Jaw Universal Power Chucks

4ATL Series 6″, 8″, 10″, 12″, 15″, 18″ & 24″ Chucks

• All steel body
• Hardened jaw way and internal parts
• ± .0005 repeatability
• 1.5mm x 60° master jaws
• 4-Jaw universal design

Model Number
Through Hole
Plunger Stroke
Jaw Stroke
Max Draw Bar Pull Force lb/f
Max. Gripping Force lb/fi
Max RPM
Wt lbs
Moment of Inertia I� (kg-m2)
4ATL6-A5
1.771"
.472"
.216"
4,945
12,813
4500
30
0.058
4ATL8-A5
2.047"
.629"
.291"
7,844
20,007
3600
53
0.177
4ATL8-A6
2.047"
.629"
.291"
7,844
20,007
3600
53
0.177
4ATL10-A6
2.952"
.748"
.346"
9,667
24.932
3200
79
0.324
4ATL10-A8
2.952"
.748"
.346"
9,667
24.932
3200
79
0.324
4ATL12-A6
3.582"
.905"
.417"
12,813
33,047
2700
129
0.763
4ATL12-A8
3.582"
.905"
.417"
12,813
33,047
2700
129
0.763
4ATL12-A11
3.582"
.905"
.417"
12,813
33,047
2700
129
0.763
4ATL15-A8
4.625"
.905"
.417"
15,961
40,405
1900
251
2.331
4ATL15-A11
4.625"
.905"
.417"
15,961
40,405
1900
251
2.331
4ATL18-A8
4.625"
.905"
.417"
15,961
40,405
1500
269
3.798
4ATL18-A11
4.625"
.905"
.417"
15,961
40,405
1500
269
3.798
4ATL24-A11
8.070"
1.023"
.472"
20,232
52,604
1000
582
15.2
4ATL24-A15
8.070"
1.023"
.472"
20,232
52,604
1000
582
15.2
Technical Specifications
PRATATLAS 4-JAW UNIVER PWRCHK TECHSPEC DIM DWG.png
Dimensions in Inches
MODEL
4ATL6
4ATL8
4ATL10
4ATL12
4ATL15
4ATL18
4ATL24
A
6.65
8.26
10
11.96
15
17.71
24
B
3.18
3.58
3.93
4.33
5.23
5.23
5.78
C (H6)
5.51
6.69
8.66
8.66
11.81
11.81
20.47
D
0.787
0.984
1.181
1.181
1.692
1.692
2.362
H
4.125
5.25
6.75
6.75
9.251
9.251
18.251
J
0.629
0.787
0.866
0.905
1.377
1.377
1.377
K
4-M10x80
4-M12x90
4-M16x100
4-M16x110
4-M20x135
4-M20x135
8-M24x150
L
1.771
2.047
2.952
3.582
4.625
4.625
8.07
M
0.196
0.196
0.196
0.236
0.236
0.236
0.236
N max.
1.259
1.523
2.007
2.413
3.22
3.22
5.507
O max.
0.895
1.171
1.328
1.801
1.781
3.139
3.444
O min
0.364
0.58
0.561
0.62
0.6
0.6
0.945
P max.
0.433
0.57
0.334
0.314
0.275
0.275
0.63
P min
-0.039
-0.059
-0.413
-0.59
-0.63
-0.63
-0.393
Q
0.078
0.078
0.078
0.078
0.196
0.196
0.196
R
0.472
0.551
0.629
0.826
0.866
0.866
0.984
S
0.748
0.807
0.984
1.102
1.692
1.162
1.496
T
1.22
1.377
1.574
1.968
2.44
2.44
2.559
U max
M55x2
M60x2
M85x2
M100x2
M130x2
M130x2
M215x3
W
2.362
2.598
3.7
4.251
5.472
5.472
9.055
X
1.456
1.496
1.692
2.007
2.598
2.598
2.874
Y
2.874
3.74
4.33
5.118
6.496
6.496
7.086
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