Mechanical Adapter Series 900 

with individual expansion lugs or expansion leafs

The Vorwald adapters of the Series 900 with individual expansion lugs or expansion leafs are required when it is necessary to effect frequent change-overs between various core sizes. Several different types of expansion lugs are available for covering all requirements: Lengthwise grooved expansion lugs made of steel and expansion lugs with smooth surface made of polyurethane or screwed versions with various different surface profiles that are quickly interchangeable.

The various different surfaces of the expansion lugs or expansion leafs ensure greatest possible torque transmission into the various different core materials. All expansion lugs and expansion leafs are equipped with a retraction system that ensures reli-able contraction. This makes push-on and push-off of the cores easy. The adapters are available for cores with internal diameters up to 500 mm.

Activation takes place with the associated expansion chuck , i.e. the adapter is positioned by a parallel key, pushed onto a expansion chuck and secured by radial set screws against axial slip. When the carrier expansion chuck expands, the expansion lugs or expansion leafs of the adapter are pressed outwards too. A further very important advantage is the absolutely concentric clamping of the cores, because all expansion lugs expand uniformly to the same extent. This makes very high winding speeds achievable.

The mantles of the adapters can be made of numerous different materials with various wall thick-nesses – depending on the intended application by the customer. Based on the Vorwald standard the adapters are customised according to the modular design principle.


  • Expansion lug or expansion leafs with various different surfaces
  • Quick adaptation to various different core diameters
  • Special dimensionsare possible on inquiry


  • Transmission of highest torques
  • True running tolerance +/- 0.1 mm
  • Quick clamping and unclamping with the existing expansion chuck
  • Absolutely centred clamping of the core

    Available adapter diameters ranging from 98 to 500 mm