640 PL – Pneumatic expanding shaft with ledges


The Model 640/PL is recommended for unwinding or winding rolls with cores.
It can be used for all types of cores, multiple rolls, and larger diameter requirements. The body of the shaft is available in a variety of light alloys or in a variety of steel, and expandors in steel, rubber, plastic or in combination, depending from the applications. The journal ends are also available in a variety of steels and are always custom-made. Expansion is obtained by a system of inflatable tubes that are located beneath each row of expandors. Each tube exerts pressure equally to engage the expandors when air is applied. This system results in greater self-centering qualities than other pneumatic shafts presently available. On request, tubes can be independent; this way, any leakage in one tube deflates only the broken one whilst the adjacent tubes continue to hold the core. Tube changes are quick and easy, accomplished without journal removal. Hex sockets free both expandors and tube for a quick procedure.


Core diameter from 38 to 600 mm
Face width up to 9000 mm
Expansion range 8 mm
Balancing up to 2200 rpm
Air pressure min. 5 bar (suggested 6 bar)

Contact your SVECOM representative for Non-Standard requirements.

Download pdf file

Do you want to receive more information on this product?

Information pursuant to art. 13 Regulation (EU) 679/2016. The data provided with the completion of this information request form will be processed and printed. Your data will be used exclusively to respond to your specific requests. Your data will not be communicated or disclosed to third parties. The data controller is Svecom-P.E. to which you can apply for the exercise of the rights referred to in Article 15 of Regulation (EU) 679/2016. To view the full information, refer to the privacy page .