Variable speed pulleys


Robust and economical


Obtaining the desired speed in the simplest way while maintaining the constant optimum efficiency of the motor, is what makes mechanical control technology from BERGES so economic.

With their modular construction our variable pulley systems are logical in their symmetrical design and mechanically simple in the way they work. The use of high-grade materials makes the variable pulleys virtually indestructible and maintenance-free. And that is not the only reason why BERGES variable pulleys have been at home in many varied mechanical applications for more than 50 years.


Assembly units RGAE


In this modular system, the proven BERGES double pulley drive with a wide V-belt is integrated in a symmetrical housing. The numerous possibilities offered by this design range from modular assembly of a wide variety of drive elements up to a connection-ready, compact variable gear unit.

Spindle and angled adjustment controls with disc type or scale hand wheel as well as hydraulic and electrical remote controls are available for speed adjustment. Incl. speed indicators (analogous or digital) and tachometers.

Three-phase motors as well as reduction gearboxes of all types with connections in accordance with IEC can be mounted directly both in U and in Z configurations.

On the output side, every BERGES assembly unit can be equipped with a two-bearing input or output shaft in flange design. This in turns allows connection of output elements in conjunction with chain or belt drives. At the same time, this shaft design provides the input for reduction gearboxes with IEC connection (hollow shaft). A gear pedestal is also available for every size.

The housings of RGAE sizes 2 to 9 have IEC connections on both the motor and output sides as standard. Size 1 corresponds to a works standard.

The variety of mounting possibilities and the clear system principle put the choice in your hands:

You assemble and complete the BERGES assembly units yourself in accordance with our examples.
You can provide us with motors and reduction gearboxes and we will assemble the unit.
We can supply you with exactly the complete, functional drive and adjustment control unit that you need. Ready for integration in your machines and installations.


Variable drive motors


A universal product range to cover the whole spectrum of drive engineering applications!


As multi-faced in their design as drive engineering in application.
In terms of drive engineering within the broad scope of machinery and plant construction, the aspect of economic control plays a determinant role. With BERGES variable drive motors, you are choosing a technology that has proved itself a million times over. Our variable drive motors are complete solutions that comprise the drive unit, speed adjustment, motor and reduction gear. Whatever kind of drive control assignment needs solving, let us have your source and target data and specify the geometry suited to your machine or plant and we will let you have a precise and stable solution that is ready for production. Make use of the enquiry form for variable drive motors or special constructions and let us propose a solution for your speed control.


Quality assurance


Our variable pulleys of high-grade steel and aluminum alloys are manufactured automatically in rational series on CNC controlled machines and systems. Here too quality assurance complies with ISO 9001.

In this way, following upstream inspection of semi-finished materials and of individual components, the finished systems are also checked for precision and proper functioning. Accordingly, comprehensive quality assurance will also include, for example, the fitting and precision running of each and every variable pulley being checked, with the balance of the pulleys being corrected as required. Subjecting our products to endurance testing which reflects practical conditions.