Rosta universal joints, oscillating mountings are ideal for gyratory sifters

Rosta offers universal joints and oscillating mountings.

Having mastered several kinds of rubber-suspension technology, including oscillating conveyors, Rosta Inc. makes a broad variety of components. For the oscillating-conveyor field, the company makes such solutions as universal joints and oscillating mountings. These items are particularly suitable for supporting gyratory screening machines, which are also referred to as gyratory sifters.

Gyratory sifters are machines that are frequently used in grain and flour conditioning, pharmaceutical powder preparation, and the chipboard sector.

A circular screening motion

This equipment is set apart by its circular screening motion, which offers a quick, complete covering of the full screen surface to create high throughput. Rosta can provide the right universal joints and single joint elements for customers who design hanging or upright sifters, for loads of up to 40,000 Newtons and rotation as high as 380 min-1.

Rosta offers two models of components for gyratory sifters – Type AK universal joints and Type AV oscillating mountings. Type AK is a maintenance-free, elastic joint that can be moved in any direction; it is useful as a universal joint support for suspending or mounting gyratory screens, screening tables, tumbling oscillators, sorters, and screening machines that are positively driven by eccentrics or freely oscillating with unbalanced drive. Types AK 15-50 have aluminum square sections, while AK 27 to AK 100-4 have SC iron housing. All other sizes have steel cores and are made of welded steel structures.

Type AV oscillating mountings are also maintenance-free elastic joints – but they are designed to guide circular motions of handing screens, such as gyratory sifters and screens in flour and paper mills or chemical processing plants. These mountings have rubber inserts larger than those in other Rosta components, which enables intensive absorption of hanging-sifter vibrations, as well as superior protection for building structures and ceilings. Type AV 50 has SC cast iron housing, and other sizes have cast iron aluminum housing. All are constructed from aluminum profiles.

The Rosta team produces these mountings with inner squares made of light metal profiles. The elements are compatible with previous models because all the dimensions are the same.

For more information, contact Rosta.

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