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.
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3-part shrink discs
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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.
The benefits
- Einfache Montage und Demontage
- Ausgleich eines erhöhten Passungsspiels
- Übertragbares Drehmoment von 27 Nm bis 12,541,000 Nm
- Nenndurchmesser von 14 mm bis 1000 mm
- Verschiedene Ausführungen und Sonderlackierungen möglich
Product overview
Mini Range
(3073)
Light Range
(3051)
Light Range
split (3051)
Standard Range
(3071)
Standard Range
split (3071)
Standard Range
strenghtened (3081)
Heavy Range
(3091)
Heavy Range
split (3091)
Heavy Range
strenghened (3093)
The three-part shrink discs are available in various designs. Depending on the installation space available to you and the required torque, we will find the right solution for you together. Half or split designs, such as those often used on impellers, are also possible with the three-piece shrink disc.
In addition, stainless variants, such as the three-part shrink disc 3071 1.4122, are available.
Assembly
It is installed by sliding the shrink disc onto the hollow shaft and the subsequent tightening of the screws. By using conical surfaces the inner diameter reduces and the radial pressure is built up. The 30xx range of shrink discs are not self-locking. The clamping forces are provided and controlled through the screws. This allows the direct compensation of the clearance between the shaft and hub, without an overload that may occur on path controlled shrink discs, due to small or over sized clearance.
To achieve proper operation with a sufficiently high
coefficient of friction, the contact surfaces between shaft and hub must
be dry, clean and free of grease.
The functional surfaces of the shrink disc, the thread and head rests of the screws, are equipped at the factory with lubricant. Molykote G-Rapid Plus or comparable must be used as a lubricant. The contact surfaces between the hub and inner ring must be provided with grease or oil before installation.
The supplied shrink discs are ready for installation.
Application examples
The 3-part shrink discs can be used flexibly and are used in the entire
area of frictionally engaged shaft-hub connections, e.g. in drive
technology, the oil and gas industry, the wood industry or hollow shaft
gearboxes.
Flohr Industrietechnik GmbH - Im Unteren Tal 1 - D-79761 Waldshut-Tiengen - Phone: +49 (0)7751 / 8731-0 - info@flohr-industrietechnik.de