Special collets, outer and inner collets

Nann manufactures special collets consisting of outer and inner collets either according to our own Nann designs or to customer drawings. With these collets the workpiece is clamped in the inner collet, and the inner collet is closed during clamping via the outer collet. The outer collet is normally pushed from the front over the inner collet and secured against distortion via cut outs on the shaft side. For this there are also cut-outs available on the inner collet. On the clamping bore side, the outside of the inner collet is cylindrically ground, while the outer collet in this area has an outer taper. If the outer collet is now closed via this taper, the workpiece is clamped in the inner collet.

There are various ways of operating this collet:

  • The outer collet remains fixed and the inner collet moves during the clamping process.
  • The inner collet remains stationary and the outer collet moves.
  • Both collets remain fixed and the clamping sleeve of the draw-in attachment moves.

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