Shrink disk
A shrink disk is a flange-shaped , non-positive shaft-hub connection . The shrink disk is applied from the outside to a hub or hollow shaft and, by reducing its inside diameter, generates pressure on the hollow shaft via conical pressing surfaces of the outer parts. This creates a press fit or a completely backlash-free, frictional connection between shaft and hub. The preload required for this is applied using high-strength screws or hydraulically.
Shrink disks are manufactured with inner diameters from 12 mm to over 1000 mm. They are one of the few shaft-hub connections that only provide the necessary frictional forces and do not transmit any torque at all. The shrink disk is therefore not itself in the force flow.
There are two-part shrink disks that are similar to conical interference fits, three-part models with a double cone and hydraulically clampable shrink disks. Shrink disks are not standardized, but the various manufacturers' models are similar in terms of performance and dimensions.
Typically, shrink disks are used on hollow gear shafts and in combination with coupling parts. They are therefore used to transmit torsional and bending moments as well as axial and radial loads.
Web links
- The shrink disk: Functionally safe and reliable , article in Konstruktionspraxis.de magazine, 2007
- Shrink disk Ringfeder RfN 4051 Light series with 2 conical surfaces (with principle diagram), company Ringfeder Power Transmission GmbH, accessed 2014-04