MicroCentric Corp
MicroCentric Corp
USA Headquarter:
25 South Terminal Drive
Plainview, NY 11803
Phone: 800.573.1139 - 516.349.7220
Fax: 516.349.9354
E-mail: sales@microcentric.com
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In the CB-NB series collet chucks, the collet is coupled directly to the draw tube connector. When the draw tube is actuated, the collet is drawn into the tapered seat of the chuck body, efficiently translating draw tube force into maximum clamping force.

CB-NB Features

  • Pull Back design maximizes the efficiency of the clamping system by concentrating all forces in the direction of the spindle for highest accuracy and greatest overall rigidity
  • Low profile OD and short overall length provides increased tool clearance and maximum utilization of the machine's Z axis
  • Radial adjusting screws to true-up the chuck assembly within .0002” (0.005mm)
  • Lubricated for life design requires minimal maintenance
  • All components hardened and precision ground for highest accuracy and long life
CB-NB Collet Chucks - Pull Back Design
Unit of Measure
Items CB-NB Collet Chucks - Pull Back Design
CB42-NB/140
CB-NB Collet Chucks - Pull Back Design 		CB-NB Collet Chucks - Pull Back Design
CB42-NB/A5
CB-NB Collet Chucks - Pull Back Design 		CB-NB Collet Chucks - Pull Back Design
CB42-NB/A6
CB-NB Collet Chucks - Pull Back Design 		CB-NB Collet Chucks - Pull Back Design
CB65-NB/A5
CB-NB Collet Chucks - Pull Back Design 		CB-NB Collet Chucks - Pull Back Design
CB65-NB/A6
CB-NB Collet Chucks - Pull Back Design
Collet Model N/A SK42BZI N/A SK42BZI N/A SK42BZI N/A SK65BZI N/A SK65BZI
Max. Clamping Diameter N/A 1.625 in42 mm N/A 1.625 in42 mm N/A 1.625 in42 mm N/A 2.625 in66 mm N/A 2.625 in66 mm
Min. Clamping Diameter N/A 0.156 in4 mm N/A 0.156 in4 mm N/A 0.156 in4 mm N/A 0.187 in5 mm N/A 0.187 in5 mm
Spindle Nose N/A 140mm N/A A2-5 N/A A2-6 N/A A2-5 N/A A2-6
Accuracy N/A .0004 in0.010 mm
Clamping Range N/A +/- .020 in+/- 0.5 mm
Linear Chuck Stroke N/A 0.16 in4 mm
Max. Clamp Force N/A 17,985 lbs80 kN N/A 17,985 lbs80 kN N/A 17,985 lbs80 kN N/A 23,605 lbs105 kN N/A 23,605 lbs105 kN
Max. Speed N/A 6,000 rpm
Max. Draw Tube Thread N/A M60x2 N/A M60x2 N/A M75x2 N/A M70x2 N/A M85x2
Weight N/A 16.7 lb7.6 kg N/A 16.7 lb7.6 kg N/A 16.7 lb7.6 kg N/A 25.8 lb11.7 kg N/A 27.6 lb12.5 kg
A Dimension N/A 4.05 in102.9 mm N/A 4.45 in113 mm N/A 4.35 in115.4 mm N/A 4.3 in109.22 mm N/A 4.85 in123.19 mm
B Dimension N/A 0.703 in17.86 mm N/A N/A 1 in25.4 mm N/A N/A
C Dimension N/A 5.95 in151.13 mm N/A N/A 6.48 in164.59 mm N/A N/A
D Dimension N/A
E Dimension N/A
F Dimension N/A
G Dimension N/A
H Dimension N/A
Standard Equipment N/A CB-NB collet chucks include a spindle adapter plate and a blank draw tube connector. Threaded draw tube connectors for specific machine configurations are furnished at no additional charge if draw tube dimensions are provided with your purchase order.
Item No. N/A 15 042 172 N/A 15 042 171 N/A 15 042 173 N/A 15 065 301 N/A 15 065 302