2-part shrink discs (displacement-controlled) are external clamping elements consisting of a pressure ring and a sleeve. By tightening the clamping screws with a specified screw tightening torque, the pressure ring is pulled axially onto the sleeve. The use of conical surfaces reduces the inner diameter of the sleeve, which applies a radial clamping force to the hollow shaft. The clamping force applied by the shrink disc connection creates a frictional connection at the contact surfaces between the shaft and hub. 2-part shrink discs have a smaller cone angle compared to 3-part shrink discs, this value is in the self-locking. Due to the small cone angle, it is necessary for the sleeve to have additional push-off threads. With the help of these push-off threads, the pressure ring and sleeve can be easily pressed apart during disassembly. 2-piece shrink discs (displacement-controlled) have a defined displacement, which means that assembly can be carried out also without a torque wrench. The clamping screws of the 2-part shrink disc (displacement-controlled) are tightened evenly in sequence until the face of the sleeve is flush with the face of the pressure ring. The torques specified in the catalog can be transmitted as soon as this assembly condition is reached.
2-part shrink discs (displacement-controlled) are available in 3 different versions. For very small torques and small installation spaces, the TAS 3173 series is suitable. For high to very high transmittable torques, you can choose between the TAS 3381 and the TAS 3393. Depending on the installation space available to you and the required torque, we will work together to find the right solution for you. We can also offer appropriate solutions for special corrosion protection or low temperature environments.
2-piece shrink discs (displacement-controlled) can transmit 20%-30% higher torques. In combination with the simplified handling, the 2-part shrink discs (displacement controlled) have proven themselves in practice, especially in the field of mining and materials handling. However, these shrink discs are used as standard in the entire area of frictionally engaged shaft-hub connections, e.g. in drive technology, the oil and gas industry, the timber industry or hollow shaft gearboxes.
Standard series STRENGTHENED (3381)
Heavy series STRENGTHENED
Shrink disc connections are frictionally engaged shaft-hub connections for backlash-free mounting of hollow shafts or hubs on shafts. As an alternative to the 2-part shrink disc (path-controlled), TAS Schäfer also manufactures 2-part shrink discs (torque-controlled) and Hydraulic Shrink DiscsIn the field of hydraulic shrink discs, TAS Schaefer is the world market leader. Due to the oil pressure, hydraulic shrink discs can be tightened in just a few minutes, thus offering an enormous time advantage and significantly reducing the workload for the fitters. The 2-part shrink discs (torque-controlled) do not have a fixed defined extension travel, therefore they are able to compensate a larger fitting tolerance during assembly. The clamping screws of the 2-part shrink disc (torque-controlled) are tightened evenly in sequence until the specified screw tightening torque is reached. Only when this assembly condition is reached is it ensured that the torques specified in the catalog can be transmitted.
However, the general applications of 3-part shrink discs2-part shrink discs (displacement-controlled) and 2-part shrink discs (torque-controlled) are mostly the same. The areas of application are for example (wind power, drive technology, raw material extraction, conveying technology, crushing technology, mixing and process technology as well as on hollow shaft gearboxes of all makes). Hydraulic shrink discs are often used on test stands, in wind turbines or on hydraulic motors. Hydraulic Shrink Discs are often used in test stands, wind turbines or hydraulic motors.
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