Special collet chucks HESK and HESK-R for internal clamping

The proven collet clamping attachments type HESK and type HESK-R are suitable for numerous application scenarios. Apart from the further development of these devices for collets with bayonet, Nann also develops special collet chucks on the basis of these devices, as well as for both external and internal clamping. The collet chucks type HESK-R are frequently used for special applications.

We manufacture for you:

  • special collets for standard devices
  • special devices with standard collets
  • special devices with special collets

Operating mode:
With the standard devices, the clamping sleeve is designed as a double-action cylinder, and it closes and/or opens the collets. The collets themselves are equipped with a shoulder on the shaft, and firmly connected to the collet clamping attachments by means of a nut. These clamping devices are ideally suited to internal clamping of workpieces. For this, instead of the mounted collet, an axially stationary basic mandrel with the external contour of a collet is mounted and screwed into the housing with a union nut. For clamping of the workpiece, depending on the application, a single or double- taper clamping sleeve is used. During clamping, it is drawn onto the basic mandrel and expanded by means of a compression mandrel. This results in a pulldown effect, and the workpiece is drawn during clamping in the direction of the housing. These collet chucks can easily be designed for a workpiece end stop. The devices can also be designed differently if necessary, to suit your applications precisely.

With special applications, too, we assure you of high Nann quality and short delivery deadlines.

Facts and figures:

  • for double tapered clamping sleeves
  • with pull-down effect
  • hydraulic clamping and unclamping
  • various sizes and clamping ranges

Please don’t hesitate to contact us. We will be glad to provide tailormade clamping devices for your requirements.