Shrink discs

Shrink discs are flange-shaped external clamping connections that enable backlash-free and friction-locked mounting of hollow shafts or hubs on solid shafts. They represent a more powerful and reliable alternative to traditional connection techniques such as shrink fits, keyways, interference fits, or polygonal connections. Unlike internal clamping connections like locking assemblies, shrink discs apply pressure externally to the hollow shaft or hub, creating a direct frictional connection between the shaft and hub without any intermediate component. The shrink disc itself lies outside the torque transmission path, allowing torque to be fully transferred through the contact surface.
Shrink discs offer numerous advantages: they are wear- and maintenance-free, easy to install and remove, and provide excellent fatigue resistance under alternating torque as well as superior concentricity. In addition, they reliably transmit not only torque and bending moments but also axial and radial forces.
These versatile connecting elements are frequently used for mounting machine shafts in hollow shaft-mounted gear units and are available in a wide range of standard and custom versions. This includes two- and three-piece variants as well as stainless-steel models tailored to specific customer requirements.