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Pratt Burnerd/Atlas CPC Series Dead-Length Collet Chucks

  • Ideal for bar work or for second operation work

  • Precision dead-length operation

  • High speed up to 8000 rpm

  • Body nickel plated for corrosion resistance

  • Repeatability .0001” (0.0025mm) on duplicate parts

  • Large thru-hole up to 3.15″ (80mm)

  • Collets are available for Round, Hex or Square parts

  • Large clamping force up to 16,060 lbf (7300 kgf)

  • CPC collet types: B42, B60 and B80 or Multi-Bore Din 6343 Collets

  • For best accuracy use  high quality CRAWFORD COLLETS

  • 1 Year Warranty

  • Chuck includes threaded connector to customer’s specifications

PRATATLAS CPC DEADLENGTH COLLETCHUCK DIMDWG.png
Part Number
CPC-42A5
CPC-42A6
CPC-60A6
CPC-60A8
CPC-80A8
Spindle Mounting
A2-5
A2-6
A2-6
A2-8
A2-8
A (mm/in)
135/5.31
170/6.69
170/6.69
220/8.66
220/8.66
B (mm/in)
104.8/4.13
133.4/5.25
133.4/5.25
171.4/6.75
171.4/6.75
C (mm/in)
82.56/3.25
106.3/4.19
106.3/4.19
139.7/5.50
139.7/5.50
D
M66 x P1.5
M66 x P1.5
M90 x P1.5
M90 x P1.5
M114 x P2.0
F (Max Threading)
M60
M60
M90
M90
M100
I (mm/in)
57/2.244
69/2.176
66/2.598
66/2.598
72/2.834
M (mm/in)
103/4.06
103/4.06
132/5.20
132/5.20
155/6.10
N (mm/in)
27/1.06
32/1.26
27/1.06
32/1.26
35/1.38
L (mm/in)
129/5.08
133/5.24
155/6.10
155/6.10
175/6.89
X (mm/in) Std-Max
16/.63-50/1.968
16/.63-50/1.968
-
-
-
Y (mm/in) Std-Max
40/1.57-80/3.15
40/1.57-80/3.15
-
-
-
Mount Screw
M10 x 4
M12 x 4
M12 x 6
M16 x 6
M16 x 6
Collet (Spring/Multi-Bore)
B42/173E
B42/173E
B60/185E
B60/185E
B80/193E
Taper Stroke
6.0/0.24
6.0/0.24
6.0/0.24
6.0/0.24
6.0/0.24
Chuck Thru-Hole (mm/in)
42/1.65
42/1.65
60/2.36
60/2.36
80/3.15
Draw Bar Force (kgf/lbf)
2500/5500
2500/5500
3000/6600
3000/6600
3500/7700
Clamping Force (kgf/lbf)
5400/11,800
5400/11,800
6500/14,300
6500/14,300
7300/16,060
Max rpm
6000
6000
5000
5000
4000
I.D Function
No
No
No
No
No
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