Email Request Newsletter


Safety spindle nut

This is an additional nut which travels parallel to the spindle nut. If a fault occurs, the safety spindle nut takes over the supporting function of the spindle nut, so preventing an uncontrolled collapse of the drive. 
Depending on the drive type, a safety spindle nut is effective with push and pull loads.

Single drive

Universal drive unit for almost all applications. Single drives are available in an extremely wide range of designs and offer maximum flexibility and functions for dealing with individual adjustment situations. The choice of a suitable drive depends on the type of drive movement which is required (rotation actuator, linear actuator) and on the performance data required for each specific application. Single drives are available as complete ready-for-use main drives (with an integrated control unit or a control unit which is mounted on the drive) and as especially compact slaves.

Single-fault protection

Dangerous operating conditions are prevented in the event of a control unit fault or a failure of the safety module (the single-fault protection device has functioned as planned). 
With DEWERT systems, the operator is advised of the first fault by means of active signalling devices, so the fault can be dealt with before a second occurs.

Slave drive

This is an especially compact drive type which must be operated in connection with a main drive or a control unit. Connection is by means of plug-in motor cables.


In comparison with conventional transformers, a switched-mode power supply (SMPS) has many advantages. It is lighter, more compact, and more efficient. It supplies a constant output voltage irrespective of the input voltage. In addition, the stand-by power consumption is very low. Depending on the version, it can be used anywhere in the world.


For linear actuators, the maximum adjustment path is described as the "stroke".

Stroke length

For linear actuators, the maximum adjustment path is described as the “stroke length”.