2-part shrink discs (torque-controlled)
2-part shrink discs (torque-controlled)
The 2-part shrink disc (torque-controlled) is an external clamping
element consisting of a pressure ring and a sleeve. By tightening the
clamping screw with the specified screw tightening torque, the pressure
ring is pulled axially onto the sleeve. By using conical surfaces, the
inner diameter of the sleeve is reduced so that a radial clamping force
is applied to the hollow shaft.
The clamping force applied by the shrink disc connection creates a
frictional connection at the contact surface between the shaft and hub.
Compared to the 3-part shrink disc, the 2-part shrink disc has a smaller
cone angle and a self-locking function. Due to the small cone angle,
the sleeve has additional push-off threads which allow the pressure ring
and sleeve to be pressed apart during disassembly.
This shrink discs do not have a defined clamping travel. This enables
them to compensate for 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. When this assembly condition is reached, it is ensured that
the torques specified in the catalog can be transmitted. 2-part shrink
discs (torque-controlled) are available in various designs.
The benefits
- Compensation of an increased fitting clearance
- Different designs and special surface finish possible
- Transmittable torque from 36 Nm to 3,356,000 Nm
- Nominal diameter from 14 mm to 660 mm
- Easy assembly and disassembly
Product overview
Standard-Series
(3171)
Standard-Series strenghtened
(3181)
Heavy Series
(3191)
Heavy Series strenghtened
(3193)
The 2-part shrink discs (torque-controlled) can generally transmit the
same torque as 3-part shrink discs and differ only in their design. Die
zweiteilgen Schrumpfscheiben gibt es in
verschiedenen Ausführungen. The two-piece shrink discs are available in
various designs. Depending on the installation space available to you,
the required torque or special environmental requirements, we will find
the right solution for you together.
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 31xx range of shrink discs are self-locking. The clamping forces are provided and controlled through the screws (force controlled). 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. Except for this are the shrink disks of the type 3173 as well as the types 3191 and 3193 to d 185 mm. They are controlled by path (front faces are flush).
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 the bush must
be provided with grease or oil before
installation. The supplied shrink discs are ready
for installation.
Application examples
As standard, 2-part shrink discs are used in the same way as 3-part shrink discs 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.
Other 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.
Flohr Industrietechnik GmbH - Im Unteren Tal 1 - D-79761 Waldshut-Tiengen - Phone: +49 (0)7751 / 8731-0 - info@flohr-industrietechnik.de