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Pratt Burnerd/Atlas PDD series Draw Down Power Chucks 

PDD Series 4″ – 15″ Chucks

  • 3 jaw draw down chuck for machining work requiring squareness and parallelism

  • High accuracy

  • Maintains high grip forces

  • Adapter mount for A type spindles, other mounts available

Model Number
Jaw Stroke Dia.
Sleeve Stroke
Grip CapacityMax.
Grip CapacityMin.
Draw Bar Pull lb/f
GripForce lb/f
Max RPM
Wt. lbs
PDD4
.197"
.276"
1.97"
.591"
1,300
3,300
3500
10
PDD5
.197"
.276"
2.56"
.591"
2,200
4,400
3500
16
PDD6-A4
.285"
.394"
3.35"
1.378"
3,300
5,500
3500
30
PDD6-A5
.285"
.394"
3.35"
1.378"
3,300
5,500
3500
30
PDD6-A6
.285"
.394"
3.35"
1.378"
3,300
5,500
3500
30
PDD8-A5
.283"
.394"
7.87"
1.575"
5,500
9,900
3000
60
PDD8-A6
.283"
.394"
7.87"
1.575"
5,500
9,900
3000
60
PDD10-A6
.425"
.591"
9.84"
1.969"
7,700
13,200
2500
101
PDD10-A8
.425"
.591"
9.84
1.969"
7,700
13,200
2500
101
PDD12-A8
.425"
.591"
11.81"
1.969"
9,900
16,550
2000
150
PDD12-A11
.425"
.591"
11.81"
1.969"
9,900
16,550
2000
150
PDD15-A8
.573"
.787"
14.96"
2.362"
12,100
19,850
1500
243
PDD15-A11
.573"
.787"
14.96"
2.362"
12,100
19,850
1500
243
Technical Specifications
PRATATLAS PDD PULLDOWN PWRCHK TECHSPEC DIM DWG.png
Dimensions in Inches
MODEL NUMBER
PD-4
PD-5
PD-6
PD-8
PD-10
PD-12
PD-15
A
4.33
5.12
6.5
8.25
10
12
15
B
2.36
2.76
3.35
3.74
4.33
4.92
5.52
C
2.362
3.15
5.512
7.48
9.055
9.055
11.81
F
0.197
0.197
0.197
0.197
0.197
0.197
0.315
H
3.15
3.937
4.125
5.25
6.75
6.75
9.055
J
0.984
1.103
1.26
1.496
1.969
2.047
2.362
K
3-M8
3-M8
6-M10
6-M12
6-M16
6-M16
6-M20
L
0.511
0.511
0.63
0.906
0.866
1.063
1.181
M
-
-
0.787
0.984
1.181
1.378
1.772
N max.
1.657
1.732
2.283
2.795
3.346
4.016
5.261
N min
1.358
1.634
2.142
2.654
3.134
3.803
4.975
O
0.984
1.181
1.378
1.272
2.165
2.756
3.74
P max.
0.748
0.748
1.299
1.496
1.85
1.85
2.795
P min
0.472
0.472
0.906
1.102
1.206
1.206
2.008
Q
0.984
1.181
1.378
1.575
1.967
2.362
2.756
R
-
-
-
1.024
1.26
1.417
1.575
S
0.787
0.984
1.417
1.417
1.811
1.989
1.989
T
M10x1.5
M12x1.75
M16x2.0
M20x2.5
M20x3.0
M20x3.0
M30x3.5
U max.
0.413
0.413
0.551
0.551
0.748
0.748
1.024
min
0.138
0.138
0.155
0.155
0.155
0.155
0.236
V
1.102
1.181
1.378
1.654
2.047
2.165
3.543
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