QCS Workholding LLC
10635 Tower Oaks Blvd.  Ste. E
Houston  TX   77070
Toll Free (888) 869-2424    Local (281) 664-1020   Fax  (281) 664-1026
mailto:workholding@hotmail.com
 

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4 Jaw Universal Power Chucks 
 

4ATL 6", 8", 10", 12", 15", 18" & 24" Chucks

• All steel body
• Hardened jaw way and internal parts
• ± .0005 repeatability
• 1.5mm x 60° master jaws
• 4-Jaw universal design
Model No. Through Hole Plunger Stroke Jaw Stroke Max Draw Bar Pull Force lb/f Max. Gripping Force lb/fi Max RPM Wt lbs Moment of Inertia I 
(kg-m2)
4ATL6-A5 1.771" .472" .216" 4,945 12,813 4500 30 0.058
4ATL8-A5 2.047" .629" .291" 7,844 20,007 3600 53 0.177
4ATL8-A6 2.047" .629" .291" 7,844 20,007 3600 53 0.177
4ATL10-A6 2.952" .748" .346" 9,667 24.932 3200 79 0.324
4ATL10-A8 2.952" .748" .346" 9,667 24.932 3200 79 0.324
4ATL12-A6 3.582" .905" .417" 12,813 33,047 2700 129 0.763
4ATL12-A8 3.582" .905" .417" 12,813 33,047 2700 129 0.763
4ATL12-A11 3.582" .905" .417" 12,813 33,047 2700 129 0.763
4ATL15-A8 4.625" .905" .417" 15,961 40,405 1900 251 2.331
4ATL15-A11 4.625" .905" .417" 15,961 40,405 1900 251 2.331
4ATL18-A8 4.625" .905" .417" 15,961 40,405 1500 269 3.798
4ATL18-A11 4.625" .905" .417" 15,961 40,405 1500 269 3.798
4ATL24-A11 8.070" 1.023" .472" 20,232 52,604 1000 582 15.2
4ATL24-A15 8.070" 1.023" .472" 20,232 52,604 1000 582 15.2

Dimensional Data
Dimensional Data (in inch)
MODEL 4ATL6 4ATL8 4ATL10 4ATL12 4ATL15 4ATL18 4ATL24
A 6.65 8.26 10 11.96 15 17.71 24
B 3.18 3.58 3.93 4.33 5.23 5.23 5.78
C (H6) 5.51 6.69 8.66 8.66 11.81 11.81 20.47
D 0.787 0.984 1.181 1.181 1.692 1.692 2.362
H 4.125 5.25 6.75 6.75 9.251 9.251 18.251
J 0.629 0.787 0.866 0.905 1.377 1.377 1.377
K 4-M10x80 4-M12x90 4-M16x100 4-M16x110 4-M20x135 4-M20x135 8-M24x150
L 1.771 2.047 2.952 3.582 4.625 4.625 8.07
M 0.196 0.196 0.196 0.236 0.236 0.236 0.236
N max. 1.259 1.523 2.007 2.413 3.22 3.22 5.507
O max. 0.895 1.171 1.328 1.801 1.781 3.139 3.444
O min 0.364 0.58 0.561 0.62 0.6 0.6 0.945
P max. 0.433 0.57 0.334 0.314 0.275 0.275 0.63
P min -0.039 -0.059 -0.413 -0.59 -0.63 -0.63 -0.393
Q 0.078 0.078 0.078 0.078 0.196 0.196 0.196
R 0.472 0.551 0.629 0.826 0.866 0.866 0.984
S 0.748 0.807 0.984 1.102 1.692 1.162 1.496
T 1.22 1.377 1.574 1.968 2.44 2.44 2.559
U max M55x2 M60x2 M85x2 M100x2 M130x2 M130x2 M215x3
W 2.362 2.598 3.7 4.251 5.472 5.472 9.055
X 1.456 1.496 1.692 2.007 2.598 2.598 2.874
Y 2.874 3.74 4.33 5.118 6.496 6.496 7.086


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