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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NK series chucks are a pull back design with the added flexibility of being able to mount end stops inside the chuck body for easy conversion from bar to chucking applications. The collet is coupled directly to the draw tube connector. As the draw tube is actuated the collet is drawn into the tapered seat efficiently translating draw tube force into maximum clamping force.

CB-NK 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
  • Removable stop plates and stop housings can be mounted inside the chuck body for chucking applications requiring end stops or part ejectors
CB-NK Collet Chucks - Combination Design
Unit of Measure
Items CB-NK Collet Chucks - Combination Design
CB42-NK/A5
CB-NK Collet Chucks - Combination Design 		CB-NK Collet Chucks - Combination Design
CB42-NK/140
CB-NK Collet Chucks - Combination Design 		CB-NK Collet Chucks - Combination Design
CB42-NK/A6
CB-NK Collet Chucks - Combination Design 		CB-NK Collet Chucks - Combination Design
CB65-NK/A5
CB-NK Collet Chucks - Combination Design 		CB-NK Collet Chucks - Combination Design
CB65-NK/140
CB-NK Collet Chucks - Combination 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
Through Capacity N/A 1.420 in36 mm N/A 1.420 in36 mm N/A 1.420 in36 mm N/A 2.245 in57 mm N/A 2.245 in57 mm
Spindle Nose N/A A2-5 N/A 140mm N/A A2-6 N/A A2-5 N/A 140mm
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 N/A 0.16 in4 mm N/A 0.16 in4 mm N/A 0.16 in4 mm N/A .160 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 M72x2 N/A M72x2
Weight N/A 16.7 lb7.6 kg N/A 16.7 lb7.6 kg N/A 16.7 lb7.6 kg N/A 36.9 lb16.7 kg N/A 35.99 lb16.32 kg
A Dimension N/A 5.1 in129.54 mm N/A 4.703 in119.46 mm N/A 5 in127 mm N/A 5.375 in136.53 mm N/A 5.178 in131.52 mm
B Dimension N/A N/A 0.703 in17.86 mm N/A 1 in25.4 mm N/A N/A
C Dimension N/A N/A 5.95 in151.13 mm 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

Each CB-NK collet chuck includes a removable stop plate, 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 15 042 161 N/A 15 042 163 N/A 15 042 162 N/A 15 065 160 N/A 15 065 163