Recirculating ball screws are devices capable of transforming rotary movement into linear movement and vice versa.

The have the same basic characteristics as conventional screws; the main difference between recirculating ball screws and conventional screws lies in the way that movement is transformed.

On conventional screws, such transformation is determined by two surfaces (the screw and nut thread surfaces) sliding against each other. In recirculating ball screws, instead, transformation of movement is determined by the rolling of balls between the two surfaces. This creates rolling friction which is much, much lower than sliding friction.

This is why recirculating ball screws have numerousadvantages compared to conventional screws:

• Firstly, they have extremely high efficiency (generally higher than 90%), making them approximately 3 times more efficient than conventional screws. Consequently, much less power is dissipated as heat, with evident advantages as far as the applied motor and energy savings are concerned.

• A long working life due to excellent resistance to wear.

• High-speed performance capabilities.

• High positioning precision as a result of being able to eliminate play.

Since they are easily installed and require no maintenance, recirculating ball screws have been successfully applied in a wide range of industries.

The recirculating ball screw, both in its ground and rolled versions, is a component for which demand is constantly increasing, with clients requiring fast delivery times and competitive prices.

In order to satisfy these needs, B.B. Mechanical Workshops has set up a production strategy which aims to meet every customer need. As far as screws are concerned, we ensure the availability of a warehouse that is well stocked with both finished and semi-finished products of various diameter and length so as to provide fast delivery times, while, as concerns the nuts, B.B. is mainly involved in the production of the DIN69051/5 type to ensure interchangeability and virtually immediate availability.

Right-hand helixes are standard while left-hand helixes can be machined on request.

Of course, whenever customers requirements depart from standardisation parameters, B.B. Mechanical Workshops is ready to provide full support in designing and appropriately sizing a new, tailor-made product.