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Pratt Burnerd/Atlas Floating Type Compensating Power Chucks

DFC Series Chucks 7″ – 16″

  • 3 jaw power chuck with float compensation designed for shaft applications machined on centers

  • Supplied with fixed or spring center (specify when ordering)

  • Maximum durability achieved through internal sliding on spherical surface

  • Adapter mount for A type spindles

  • Larger sizes available on request

Model Number
Jaw Stroke Dia.
Sleeve Stroke
Comp Range Stroke
Min. Gripping Dia.
Draw Bar Pull lb/f
Grip Force lb/f
Max RPM
Wt lbs.
DFC7-A4
0.394
0.787
0.157
0.787
3200
5550
4000
33
DFC7-A5
0.394
0.787
0.157
0.787
3200
5550
4000
33
DFC7-A6
0.394
0.787
0.157
0.787
3200
5550
4000
33
DFC8-A6
0.787
0.984
0.157
0.984
4400
6600
3200
62
DFC8-A8
0.787
0.984
0.157
0.984
4400
6600
3200
62
DFC10-A6
0.787
0.984
0.196
1.181
5076
7936
2500
108
DFC10-A8
0.787
0.984
0.196
1.181
5076
7936
2500
108
DFC12-A8
0.984
1.181
0.236
1.181
5700
9250
2000
128
DFC12-A11
0.984
1.181
0.236
1.181
5700
9250
2000
128
DFC16-A8
1.181
1.634
0.394
1.575
6850
19850
1000
374
DFC16-A11
1.181
1.634
0.394
1.575
6850
19850
1000
374

Larger Diameter chucks available upon request

Technical Specfications
PRATATLAS DFC COMPENSATE TECSPEC DIMDWG.png
MODEL
DFC7
DFC8
DFC10
DFC12
DFC16
A
6.69
8.46
10
11
16.5
B
3.9
4.97
5.63
6.09
7.28
C
5.512
7.48
8.66
10.039
14.961
D
0.157
0.165
0.196
0.224
0.224
E
4.125
5.25
6.75
6.748
8.661
F
1.654
2.244
2.64
2.835
3.543
G
1.024
1.575
1.77
1.969
1.969
H
0.433
0.512
0.67
0.669
1.102
J
M34x1.5
M50x1.5
M58x1.5
M55x1.5
M70x1.5
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