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Atlas 3-Jaw Closed Center Power Chucks
PRATATLAS PA SERIES CLOSED CTR PWR VUVK_

PA 18″ – 63″ Large Diameter Chucks

  • All steel body

  • Standard 3-jaw closed center wedge chuck for general machining

  • Hardened jaw ways and all internal parts

  • Standard metric serrations 3.0mm serration pitch

Model Number
Mount Width*
Jaw Stroke Dia
Sleeve Stroke
Gripping CapacityMax
Gripping CapacityMin
Draw Bar Pull lb/f
Grip Force lb/f
Max RPM
Wt lbs
PA18-A11
1.06"
.630"
1.378"
17.71"
5.19"
18400
55977
2710
274
PA21-A11
1.06"
.630"
1.378"
20.87"
2.68"
18400
61350
1940
367
PA24-A11
1.06"
.630"
1.378"
24.02"
5.98"
18400
61350
1760
492
PA24-A15
1.06"
.630"
1.378"
24.02"
5.98"
18400
61350
1760
492
PA28-A11
1.06"
.630"
1.378"
27.95"
1.37"
18400
61350
1200
617
PA28-A15
1.06"
.630"
1.378"
27.95"
1.37"
18400
61350
1200
617
PA32-A11
1.06"
.787"
1.496"
31.49"
7.08"
22500
53900
900
705
PA32-A15
1.06"
.787"
1.496"
31.49"
7.08"
22500
53900
900
705
PA40-A11
1.06"
1.181"
2.244"
39.37"
11.42"
40450
89900
500
1323
PA40-A15
1.06"
1.181"
2.244"
39.37"
11.42"
40450
89900
500
1323
PA40-A20
1.06"
1.181"
2.244"
39.37"
11.42"
40450
89900
500
1323
PA50
1.06"
1.181"
2.244"
49.21"
11.42"
40450
89900
450
1763
PA55
1.06"
1.181"
2.244"
53.12"
11.42"
40450
89900
400
2425
PA63
1.06"
1.181"
2.244"
62.99"
11.42"
40450
89900
350
3307
Technical Specifications
PRATATLAS 3J CLSDCTR PWRCHKS 18-63 DIA TECHSPEC.png
Model Number
PA-18
PA-21
PA-24
PA-28
PA-32
PA-40
PA-50
PA-55
PA-63
A
17.71
20.87
24
27.95
31.49
39.37
49.21
55
63
B
4.48
4.92
4.92
5.9
5.9
7.09
7.09
7.8
7.8
C
11.81
14.96
14.96
14.96
14.96
20.47
20.47
28.35
28.35
F
0.236
0.236
0.236
0.236
0.236
0.314
0.314
0.314
0.314
H
9.25
13
13
13
13
18.25
18.25
25.5
25.5
J
-
-
-
-
-
-
-
-
-
K
6-M20
6-M22
6-M22
6-M22
6-M24
6-M24
6-M24
6-M24
6-M24
L
1.18
1.22
1.22
1.22
1.38
1.38
1.38
1.38
1.38
M
1.69
2.36
2.36
2.36
2.99
3.94
3.94
3.94
3.94
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