Schmidt-Kupplung shaft couplings handle severe parallel offsets

If driven equipment is required to be displaced radially during operation, problems tend to arise. This is usually because the radial displacement can be disproportionate to the axial distance between shaft ends (DBSE); using conventional shaft couplings to transmit loads through a large parallel offset can necessitate a longer DBSE.

Extending the DBSE can result in an increase in the machine's footprint, which is not acceptable in most instances. Furthermore, other coupling designs may suffer from a degradation of torque capacity and increased backlash during operation when required to accommodate such a high degree of parallel offset.

Fortunately, a viable alternative to this problem does exist in the form of the Schmidt-Kupplung range of shaft couplings offered by Abssac.

The Schmidt-Kupplung allows for exceptional radial movement while reliably transmitting backlash-free torque. This well-balanced system transmits torque without adding side loads to the drive. Most importantly, the Schmidt-Kupplung delivers all these advantages in an extremely compact design. For example, it is possible to have a parallel shaft offset of 275mm in an overall length of 284mm.

Compensation for variable parallel shaft offset

A classic design for extreme parallel offset, the Schmidt-Kupplung is a compact, torsionally stiff, high-performance shaft coupling that compensates for variable parallel shaft offset during operation. The Schmidt-Kupplung is also excellent for connecting shafts in confined spaces. Through its modular construction both torque transmission and radial offset capacity can be optimised for each application (see the three alternative configurations illustrated here).

The well-balanced design means that the Schmidt-Kupplung is used in many applications; in fact the design can be used in any transmission design characterised by high torque, high shaft offset and small DBSE. The precision coupling transmits torque under constant velocity at all possible offsets and can transmit torques from 35Nm to 6610Nm.

The couplings are able to transmit high torques because the central disc is always defined. Indeed, it is a mechanical guarantee that the centre disc finds its location and is always in the same place when the device is offset.

Applications for Schmidt-Kupplung shaft couplings

Typical applications for the Schmidt-Kupplung range include:

• Printing machines
• Roll forming machines
• Laminating machines
• Corrugated paper and papermaking machines

Of these, however, printing represents the largest area of application. One reason for this is that shaft couplings for the printing industry are required to work with high precision to guarantee a register pressure and therefore ensure a high print quality.

The Schmidt-Kupplung is available in three basic series for various performance levels, namely Standard, Power Plus and Offset Plus. There are also three different shaft-hub connections available: a taper lock, standard bore or flange mount.

Follow the link for more information about the Schmidt-Kupplung shaft couplings from Abssac.