Ultimate Chuck Dimensions

Ultimate Chuck drawing.jpg
NOMINAL CHUCK SIZE 7” 8” 10” 12” 16” 20” 25”
Model UC2 180-53 215-66 260-81 315-104 400-128 500-155 630-167
Chuck outside diameter A 7.09 8.46 10.24 12.40 15.75 19.69 24.80


Through hole
B 2.09 2.59 3.18 4.00 5.04 6.10 6.57
C 4.13 4.68 5.43 5.75 6.14 7.08 7.07
(UC2B) C 5.89 5.89 7.24 7.19
Direct mount spindle sizes A5, A6 A6, A8 A6, A8 A8, A11 A11, A15 A11, A15 Z-520



Max. thread with adapter
D M60 M75 M90 M100 M138 M170 M180
E max 1.63 1.93 2.04 2.54 3.40 3.97 4.74
F 2.56 3.35 4.09 4.52 4.92 6.29 7.87
(UC2B) F 4.72 5.83 6.53 7.99
Piston stroke - max 0.83 0.94 1.10 1.10 1.18 1.38 1.57
Stroke per jaw - max.
0.27 0.30 0.35 0.36 0.39 0.45 0.50
Stroke per jaw with most commoncylinder stoke* *see note 0.23 0.28 0.31 0.30 0.30 0.45 0.43
Jaw adjustment pitch 0.19 0.19 0.22 0.22 0.22 0.28 0.28
Drawbar pull - max. lbs. 7,400 11,900 16,410 22,480 29,900 39,000 39,000
Total grip force lbs. 13,480 22,480 30,350 40,466 53,954 68,000 68,000
Max RPM - UC2 6,300 6,000 4,700 4,000 3,500 2,200 1,700
Max RPM - UC2B 2,800 2,450 1,400 1,000
Weight without jaws lbs. 39 54 110 161 269 518 926