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Pratt Burner/Atlas 5C & 16C Pull Back Power Chucks

A Type Mount

• Short overall length excellent for main or sub-spindle applications
• Chuck accuracy is .0003” TIR from rear mounting register and working collet taper
• High speed up to 6000 rpm
• Body nickel plated for corrosion resistance
• Hardened and ground main body and cone
• Straight recess or available with A type mountings. Other mounting types available on request
• In second operations work, shoulder components can be stopped against the face of the collet
• Both collet types are internally threaded in the rear end to house either a backstop or ejector if required
• Drawback Spring CRAWFORD COLLETS achieve the highest possible concentric accuracy
• Chuck includes threaded connector to customers specifications

PRATATLAS PULL BACK 5C-16C COLLETCHK TECHSPEC DIMDWG.png
Chuck Type
5C
5C
5C Threaded
5C Threaded
16C
16C
Spindle Mounting
A2-5
A2-6
A2-5
A2-6
A2-5
A2-6
A (mm/in)
137/5.393
166/6.535
137.5.393
166/6.535
137.5.393
166/6.535
B (mm/in)
104.8/4.125
133.4/5.252
104.8/4.125
133.4/5.252
104.8/4.125
133.4/5.252
C (mm/in)
82.56/3.250
106.38/4.188
82.56/3.250
106.38/4.188
82.56/3.250
106.38/4.188
D (mm/in)
Max. M58
Max. M65
Max. M58
Max. M65
Max. M58
Max. M65
F (mm/in)
70/2.756
70/2.756
55/2.187-10T
55/2.187-10T
76/2.992
80/3.149
I (mm/in)
83/3.267
83/3.267
83/3.267
83/3.267
89/3.504
89/3.504
L (mm/in)
122/4.803
122/4.803
122/4.803
122/4.803
145/5.708
145/5.708
Maximum Force
1800kgf/3968lbf
1800kgf/3968lbf
1800kgf/3968lbf
1800kgf/3968lbf
2300kgf/5070lbf
2300kgf/5070lbf
Maximum RPM
6000
6000
6000
6000
5000
5000
Chuck Order No.
CPB-5CA5
CPB-5CA6
CPB-5CA5-TH
CPB-5CA6-TH
CPB-16CA5
CPB-16CA6
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