Backlash-free shaft coupling with integrated clamping system

ROTEX GS has been integrated with the ETP clamping system in a collaborative effort between KTR and the Swedish company ETP Transmission AB, specialist suppliers of shaft-hub-connections, utilising Blaise Pascal's principle of pressure propagation in liquids. The new backlash-free and highly accurate ROTEX GS ETP is made entirely of steel and specifically suitable for applications involving high-speed drives.

The clamping system of this new coupling type consists of a double-walled, hardened steel sleeve that is filled with a pressurising medium. The flange comprises a piston with a gasket and a screw which is tightened on the piston for pressure generation.

The screw is tightened radially, while no axial space for assembly tools is required. When under pressure, the sleeve expands generating a uniform surface pressure against shaft and hub. This principle of just a single screw allows for assembly within a few seconds and ensures a continuously variable positioning of the coupling. The uniform stress distribution in the basic body of the hub results in an accurate concentricity of the ETP system while achieving a very smooth running result.

Currently KTR and ETP are working on a two-part type which will allow for the use of other coupling types and materials. For further details about the ROTEX GS ETP please go to https://www.ktr.com.