Rosta oscillating mounting element guides circular motions of hanging screens

The Type AV oscillating mounting

With its mastery of three types of industrial technology – rubber-suspension, oscillating-conveyor, and tensioning technology – Rosta Inc. produces high-end machine components for use in various sectors. One popular option, the Type AV oscillating mounting element, is a maintenance-free elastic joint for guiding the circular motions of hanging screens, especially gyratory sifters.

The Type AV works for flour mills, paper mills, chemical processing facilities, and other manufacturing plants with handing screens in their processes. It is recommended for use in the chemical, food-processing, and pulp and paper industries.

Intense absorption of vibration

The rubber insert is a feature that sets this oscillating mounting element apart from other Rosta products. Larger than the inserts in other components, it allows the Type AV to absorb the vibrations of hanging sifters more intensively – which protects ceilings and building structures more effectively. The mounting typically has a cast aluminum housing, as well as a core built out of aluminum profiles. Since 2014, Rosta has been producing the Type AV with an inner square made of light metal profiles, although the older design is still available as a special element.

The Type AV oscillating mounting element has provided significant benefits for customers across the country and around the world. A prime example is SWECO, a screening-machine producer based in Florence, KY. A number of years ago, when SWECO needed a new option for supporting screen boxes in its gyratory sifter, it gave this mounting a shot. The existing sifter had 5,500-kilogram screen boxes mounting on four truck drive shafts, which had led to insufficient lubrication and one-sided wear on the bearing bushings. Twice a year, the SWECO team had to replace eight universal joints – a process that wasted both production and time.

Since maintenance was too much, SWECO called Rosta for a better option. After Rosta recommended the Type AV and SWECO applied it, joint replacement became unnecessary and assembly and re-levelling of sifting boxes was now easier and faster. Since then, four SWECO gyratory sifters have shown no sign of wear after several years of continuing operation.

For more information, contact Rosta.

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