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Pratt Burnerd/Atlas King Bore 3-Jaw Power Chucks
PRATATLAS ATL 3-JAW KING BORE_edited.png

Atlas ATLB Series King Bore 6″ thru 18″

  • Super large thru-hole

  • Easy Retrofit

  • Interchangeable Top Tooling 1.5mm x 60° serrations

  • High speed

  • Full 2 year warranty parts and labor

  • Hardened jaw ways, master jaws and internal parts

  • Quick Change cover plate for closed center applications.

  • Chuck accuracy plus/minus .0005” repeatability

MODEL
ATLB6-A5
ATLB8-A6
ATLB10-A8
ATLB12-A11
ATLB15-A15
ATLB18-A15
Through-Hole (in)
2.047
2.598
3.071
4.803
5.59
6.555
Plunge Stroke (in)
0.472
0.63
0.748
0.905
0.905
0.905
Jaw Stroke (in)
0.212
0.291
0.346
0.413
0.413
0.413
Pull Force (lbf)
7974
7828
9647
12788
15928
15928
Grip Force (lbf)
12788
19965
24902
32978
40381
40381
Oper. Pressure (psi)
262
292
392
292
363
363
Max. Speed (rpm)
6000
5000
4200
3200
2500
2000
Weight (lbs)
31
53
83
144
287
355
Mount of Inertia (kg-m2)
0.16
0.14
0.4
0.95
3
4.77
Grip O.D. Range (in)
.63-5.0
.78-6.25
.98-8.25
1.61-10.75
2.36-14.0
2.95-16.0
Technical Specfications
Model
A
B
C
D
E
F
G
H
J
K
H6
ALTB6-A5
6.69
3.58
5.51
0.787
0.59
3.25
4.566
4.125
0.57
6xM10
ALTB8-A6
8.26
4.05
6.69
0.984
0.669
4.188
5.905
5.25
0.767
6xM12
ALTB10-A8
10
4.45
8.66
1.181
0.708
5.5
7.48
6.75
0.944
6xM16
ALTB12-A11
12.4
5.27
11.81
1.181
0.866
7.716
10.236
9.252
1.102
6xM20
ALTB15-A11
15.94
6.06
14.96
1.692
1.063
11.25
13
13
1.299
6xM24
ALTB20-A15
18
6.06
14.96
1.692
1.063
11.25
13
3.3
1.299
3xM24
Dimensional Data (in inch)
Model
L
M
N Max.
O Max.
O Min.
P Max.
P Min.
Q
R
S
ALTB6-A5
2.04
0.197
1.35
0.718
0.364
1.023
0.551
0.079
0.472
0.787
ALTB8-A6
2.59
0.197
1.653
0.935
0.462
1.24
0.61
0.079
0.551
0.787
ALTB10-A8
3.07
0.197
2.086
1.328
0.561
1.043
0.295
0.079
0.63
0.984
ALTB12-A11
4.8
0.236
2.921
1.427
0.501
1.653
0.748
0.079
0.827
1.102
ALTB15-A11
5.59
0.236
3.681
1.781
0.6
1.338
0.433
0.197
0.866
1.693
ALTB20-A15
6.65
0.236
3.807
2.49
0.718
1.338
0.433
0.197
0.866
1.693
Dimensional Data (in inch)
Model
T
U Max.
V
W
X1 (H12)
X2
X3
X4
ALTB6-A5
1.26
M60x2
3xM6
2.559
0.63
1.417
2.559
M8
ALTB8-A6
1.456
M74x2
3xM6
3.149
0.63
1.771
3.149
M8
ALTB10-A8
1.653
M87x2
3xM8
3.701
0.63
2.362
4.016
M10
ALTB12-A11
2.047
M135x2
3xM10
5.63
0.787
2.362
5.433
M10
ALTB15-A11
2.441
M155x2
3xM12
6.456
0.787
3.149
6.3
M12
ALTB20-A15
2.441
M180x3
3xM12
7.44
0.787
3.937
6.3
M12
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