Super compact ball screw motors from STÖBER

For spindles of your choice

The universal, super compact STÖBER ball screw motors are designed for universal mounting to spindles from many different manufacturers.

For individual solutions

The STÖBER EZS and EZM ball screw motors in 2 sizes (5 and 7) and 3 lengths (power stages) offer a broadly based range for standard applications.

All the models are also available as brake motors.

The options are further increased by a fully integrated liquid cooling system – without changing the dimensions. Forced cooling fans are also available for the EZS ball screw motors.

High-efficiency motor engineering

The super compact STÖBER ball screw motors offer an extremely high volume output.

The basis is the industrial application of an orthocyclic tooth winding system.

This new system enables the stator teeth winding to be produced with the maximum possible copper fill factor. This is the basis of the compact, weight-saving construction.

The motor power is about 80% higher than with a conventional winding.

Direct drive for rotating spindle shafts

The STÖBER EZS ball screw motor has been specially developed for ball screw drives with a rotating spindle shaft.

The motor shaft is in the form of a blind hole hollow shaft. The spindle rod and motor shaft can be connected with a clamping set.

The motor dynamics can be modified if required

This new motor design provides a balance between powerful torque, high dynamics and precise synchronism. The dynamic behaviour can be modified on the EZS 502/503 and 702/703 models if required.

STÖBER EZM ball screw motor for spindle nuts with a flange to DIN 69051-5

A hollow shaft motor is needed for direct drive of a spindle nut. The STÖBER EZM servo ball screw motor with its generously sized flanged hollow shaft has been developed for these applications. Special axial angular contact ball bearings absorb the high axial forces from the ball screw drive.

The design of the flange meets the requirements of DIN 69051-5, type S.

As an alternative to the type S version, the flange nut can be mounted on the flanged shaft of the motor through adapter sleeves.

Simplifies assembly and servicing

Using the ServoStop gear brake, it is quite easy to remove or replace the motor on a vertical axis without any extra precautions.

Fail-safe spring-loaded brake

The holding brake integrated in a motor adapter is an electrically operated spring applied brake which is actuated automatically by spring force in a voltage drop or emergency stop situation (fail-safe springloaded brake).

Cyclic brake test

The holding torque of the brake system can be automatically tested when necessary (cyclic brake test). The brake lining is refreshed by several automatic "grinding" operations.

These brake management functions are carried out by the master control system.