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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
Unit of Measure

Collet Model

 N/A SK80BZI

Max. Clamping Diameter

 N/A 3.250 in82.5 mm

Min. Clamping Diameter

 N/A 0.500 in12 mm

Through Capacity

 N/A 2.700 in68 mm

Spindle Nose

 N/A A2-8

Accuracy

 N/A .0004 in0.010 mm

Clamping Range

 N/A +/- .020 in+/- 0.5 mm

Linear Chuck Stroke

 N/A .160 in4 mm

Max. Clamp Force

 N/A 25,853 lbs115 kN

Max. Speed

 N/A 5,500 rpm

Max. Draw Tube Thread

 N/A M90x2

Weight

 N/A 55.5 lb25.17 kg

A Dimension

 N/A 5.68 in144.27 mm

B Dimension

 N/A 1.105 in28.07 mm

C Dimension

 N/A 8.25 in209.55 mm

Item No.

 N/A 15 080 352

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.