Locking units - Frictional connections

STÜWE frictional connections can be easily and non-destructively installed and removed – unlike friction-type connections which are joined either thermally or by other means. The clearance fits between a shaft and hub or between a hub and a “STÜWE disc” enable easy installation and removal.

Renowned companies throughout the world appreciate the benefits of the high-quality and sophisticated frictional connections Made in Germany.

Downloads

No entries available

Overview standard types / series

HSD Shrink discs - mechanical

The HSD type shrink disc is a removable machine element for the connection of a hollow shaft to a shaft. The shrink joint is a maintenance-free, impervious to dirt due to the press fit, connection that finds a wide range of applications
HYD Shrink discs - hydraulic

The hydraulic shrink disc type HYD is based on the same principle as the type HSD mechanical shrink disc. Due to the hydraulic locking, in comparison with the type HSD mechanical shrink disc only a fraction of the assembly and disassembly time is required.
SDG Shrink discs - splitted

The SDG type shrink disc is a four-piece shrink disc for the space-saving shrinking on of disc-shaped components such as gears, for example.
AS External locking units

With the AS type outer locking unit, disc-shaped attachments such as, for example, brake discs, rope sheaves or pulleys can be mounted on shafts.
IS Internal locking units

Hubs of all types can be assembled on customary shafts with the internal locking unit. In the process, every type offers the following advantages: self-centring, self-locking taper angle and improved true concentric running through pre-centring.
WK / WKL Shaft couplings

The WK and WKL shaft couplings are suitable everywhere where a secure, rigid connection of two free shaft ends is required with little effort.
FKH / FKHA / FKHYD Flange Couplings

We offer the complete flange coupling for every application from stock. All STÜWE products are characterised by quick assembly and disassembly.
GF Cardan shaft couplings

The type GF cardan shaft flange is ideally suited for the connection of standard cardan shafts to cylindrical shafts.

Depending upon the shaft-hub connection, there are a variety of different locking solutions available. In addition to the HSD or AS shrink disc as the standard external locking solution, the range also includes shaft couplings and cardan shaft flange connections with standard DIN connections. The catalogue data and the software application are available and ready to be utilised for the application-specific design of the shaft-hub connection. And if the standard is not enough, STÜWE will be happy to develop the right solution specifically for your application.

1

2

3

4

Advantages at a glance

Safe transmission at torques of up to 18000000 Nm
Suited for shaft diameters from 8 mm up to over 1000 mm
Quick and easy, space-saving installation and non-destructive removal
No frictional corrosion Compact design
Normal surface qualities of shafts & hubs
May be used as an application-related assembly
May be fastened using bolts or hydraulic systems

Functionality

All STÜWE friction connections are based on the same physical principle which uses conical rings that are axially displaced against each other, so that an equal and consistent pressure is generated. Due to the generated friction, a torque and/or an axial force can be applied this way. The advantages of our shrink discs and other brands are summarised below.

Areas of application - Application examples

Frictional connections are versatile in their use. They can be used in practically all powertrains and in many other applications. The individual sizes range from just a few mm up to more than 1 000 mm, with transmission torques of a few Nm up to more than 18.000.000 Nm.

Wind turbines

Shaft-hub connection on the slow and quick sides in wind turbines

Crushing equipment

A shock-resistant connection between the motor and rollers in crushing equipment

Marine drives

Locking units for main engine couplings and shaft couplings in marine drives

Rolling mill equipment

Suited for alternating torques and impact loading in reversing operation of a rolling mil

Belt drives

Flange coupling for the connection of a gear motor with a drive shaft

Test beds

Possible applications in test bed equipment, also with hydraulic tensioning

Further areas of use:

Fixing of brake discs
Fixing of slip-on gears to a shaft
Fixing of couplings in such as printing presses, agitators
Axial fixing of mechanical seals

Fixing of paddle wheels in tailings facilities
Fixing of water wheels Fixing of flywheels
Fixing of shafts in such as weaving machines or other precision mechanics applications

For measurement and testing equipment (1757 KB)

For crushing equipment (1539 KB)

For driveline technology (1148 KB)

For mixing and processing equipment (1174 KB)

Advice on your best solution

Our frictional connections are considered state of the art. In particular, our various shrink disc models have long been established in drive technology. They achieve the maximum grip in the shaft-hub connection and are insensitive to shock, impact and corrosion. Therefore, they work absolutely reliably even under extreme conditionsand of course, we also recommend our range because we are convinced of the total suitability across the range. However, if the correct design is not available for your individual application, we will produce any shaft-hub unit using the latest design and calculation methods until it meets your requirements 100%. Customer-specific solutions are our speciality.

All STÜWE friction connections are based upon the same principle and in their simplest form, they consist of an inner and an outer ring with opposite facing conical surfaces. A pressure is generated by axial displacement (mechanical or hydraulic) of the outer ring against the inner ring. As a result, the outer ring expands outwards, while the inner ring is compressed inwards. The existing friction of the pressure that occurs between the hub and the shaft means that a torque and/or an axial force can be applied. This depends on the coefficient of friction, the clearance, the locking length and the shaft diameter.

Large stock

For a fast and reliable delivery service, we keep the raw materials as forging blanks for all of the most common diameters in stock ready for our customers. Despite the high capital commitment, the decision was made to take this step in order to ensure a fast and reliable availability for special drive elements as well. Our customers appreciate this and trust the performance of FLOHR.