3-part Shrink Discs

3-part shrink discs are external clamping elements and consist of a pressure ring with thread, a pressure ring with through holes and a slotted inner ring. By tightening the clamping screws with the specified tightening torque, the two pressure rings of the 3-part shrink disc move towards each other on the slotted inner ring. The use of conical surfaces reduces the inner diameter of the inner ring, which applies a radial clamping force to the hollow shaft. The applied clamping force of the shrink disc connection creates a frictional connection at the contact surfaces between the shaft and hub. Compared to 2-part shrink discs, 3-part shrink discs have a larger cone angle. This has the advantage that it is sufficient to loosen the clamping screws to disassemble the shrink disc connection. Due to the larger cone angle, which is outside the self-locking area, the use of push-off screws can be dispensed with. This reduces disassembly times. Furthermore, the use of slotted inner rings can compensate for a larger fitting tolerance between the hollow shaft and the shaft. Compared to 2-part shrink discs, this is also common for larger nominal diameters.

3-part shrink discs are available in various designs. Depending on the installation space available to you and the required torque, we will work together to find the right solution for you. Half or split designs, such as those frequently used on impellers, are also possible with the 3-part shrink disc

These properties make the 3-part shrink disc a flexible product that can be used in the entire field of frictionally engaged shaft-hub connections, e.g. in drive technology, the oil and gas industry, the wood industry or hollow shaft gearboxes.