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Oscillating Conveyor Technology

Free Oscillating Systems

Free oscillating systems include screening machines, vibrating feeders and shaking conveyors which require reliable, high-performance suspension components. 

ROSTA offers a wide range of oscillating mountings for these types of machinery. 
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ROSTA's range of oscillating mountings provide dependably reliable performance and durability with zero-maintenance to provide best-in-class levels of isolation and efficiency for all free oscillating vibrating systems, from onion sorting shakers to dewatering screens.
Product information
Download our product catalogue for technical product information, a in-depth technology overview and more, or get in touch with our sales department to have a consultation on how ROSTA can help you.
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types
90-11092018-040274

Type AB

ROSTA oscillating mountings type AB are maintenance-free elastic rockers for the support or suspension of freely oscillating vibrating equipment with a wide variety of designs and drive systems. They assist the driving forces in the conveying direction and assure good linear guidance of the oscillating part of the machine. The pantograph structure of the oscillating mounting allows large spring deflection under load, which results in low natural frequencies (down to approx. 2.2 Hz) and hence exceptionally high insulation efficiency towards the support structure. The great lateral stability of ROSTA oscillating mountings prevents the wobbling of the screen casing typical of helical spring mountings on passing through the resonant frequency.

The housings of the element sizes AB 15 to 38 are made out of light alloy profile and are equipped with lateral fixation flanges, including the required fixation bores for direct mounting on customers machine part. The mountings AB 45, AB 50 and AB 50-2 have spheroidal graphite iron feet for direct bolting to the screen and the support structure.
The housings of the double rubber suspension units are of aluminium profile for sizes AB 15 to AB 45, and in spheroidal graphite iron for sizes AB 50 and AB 50-2.
All AB oscillating mountings are also available in stainless steel (AISI 304) and interchangeable with the blue AB oscillating mountings!

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90-11092018-041286

Type AB TWIN

ROSTA AB50 TWIN and 50-2 TWIN offer very high loading capacities as a result of the special twin construction of the parallel rubber suspension units arranged on each side of the support arms. The loading values are doubled compared to the versions AB 50 and AB 50-2.

The TWIN versions are eminently suitable for mounting large-scale screen plant and screens including counter-oscillating frames, where the overall weight of the machine is ten or more tones. The TWIN versions, owing to the identical guide geometry and natural frequency, may also be combined with the standard AB 50/50-2, and installed at the feed or discharge ends of the screen, depending on the supported weight.

The mountings are bolted directly at the spheroidal graphite iron feet to the screen and the support structure.

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90-11092018-041593

Type AB-D

The AB-D offers a much higher loading capacity than the AB for the same compact design. The linear spring deflection under load is still sufficient to assure for this oscillating unit the respectably low natural frequency of approx. 3.2 Hz. At a vibrator or wave frequency of approx. 16 Hz, this is sufficient for a high insulation efficiency of approx. 95%. As with all screening machine mountings from ROSTA, the characteristic of the AB-D assists the linear oscillation motion of the screen. No lateral guides are necessary for passing through resonance in a controlled manner; the mounting is laterally stable. This low-cost oscillating unit offers sufficient insulation for all plants that are not mounted on high screen platforms or steel structures "above ground".

The units are mounted by directly bolting the steel supports to screen and support structure.
The housings of the double rubber suspension units are of aluminium profile for sizes
AB-D 18 to AB-D 45, and in spheroidal graphite iron for the three sizes AB-D 50.

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90-11092018-045071

Type AB-HD

The oscillating mounting type AB-HD is the "Heavy Duty" version in the AB mount family of the ROSTA screen suspensions. For example the AB-HD type 50-2 offers 40 % more load capacity compared to the standard version AB 50-2 (14′000 instead of 10′000 N) by a slightly higher natural frequency (f = approx. 2,7 Hz instead of 2,3 Hz).

The AB-HD screen mount is the ideal suspension for mining- and aggregate screen working under variable charging capacities and are less sensitive on possibly occurring overload situations. Furthermore, due to the high load capacity, these mountings are also predestined for screens submitted to impact loading situations (e.g. charged by front-end loaders).
All AB-HD oscillating mountings are also available in stainless steel (AISI 304) and interchangeable with the blue AB-HD oscillating mountings!

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90-11092018-045358

Type ABI

ROSTA oscillating mountings type ABI are maintenance-free elastic rockers for the support or suspension of freely oscillating vibrating equipment with a wide variety of designs and drive systems. They assist the driving forces in the conveying direction and assure good linear guidance of the oscillating part of the machine. The pantograph structure of the oscillating mounting allows large spring deflection under load, which results in low natural frequencies (down to approx. 2.2 Hz) and hence exceptionally high insulation efficiency towards the support structure. The great lateral stability of ROSTA oscillating mountings prevents the wobbling of the screen casing typical of helical spring mountings on passing through the resonant frequency.

All ABI oscillating mountings are in stainless steel (AISI 304) and interchangeable with the blue AB oscillating mountings!

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90-11092018-045605

Type ABI-HD

The oscillating mounting type ABI-HD is the "Heavy Duty" version in the AB mount family of the ROSTA screen suspensions. For example the ABI-HD type 50-2 offers 40 % more load capacity compared to the standard version AB 50-2 (14′000 instead of 10′000 N) by a slightly higher natural frequency (f = approx. 2,7 Hz instead of 2,3 Hz).

The ABI-HD screen mount is the ideal suspension for mining- and aggregate screen working under variable charging capacities and are less sensitive on possibly occurring overload situations. Furthermore, due to the high load capacity, these mountings are also predestined for screens submitted to impact loading situations (e.g. charged by front-end loaders).
All ABI-HD oscillating mountings are in stainless steel (AISI 304) and interchangeable with the blue AB-HD oscillating mountings!

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90-11092018-046642

Type AK

The ROSTA universal joints type AK are maintenance-free elastic joints which can be moved in any direction. They are used as universal joint supports for mounting or suspending gyratory screens, screening tables, tumbling oscillators, sorters and screening machines positively driven by eccentrics or freely oscillating with unbalanced drive.

The types AK 27 until AK 100-4 have got housings made of SC iron, all the other sizes are made of welded steel structures. The types AK 15 to AK 50 have got aluminium square sections, the other sizes have steel cores.

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90-11092018-046848

Type AV

The ROSTA oscillating mountings type AV are maintenance-free elastic joints designed for guiding circular motions of hanging screens such as gyratory sifters and screens in flour mills, chemical processing plants and paper mills.

The rubber inserts of these oscillating mountings are larger than the ones of the other ROSTA elements. Therefore they intensively absorb the vibrations of the hanging sifters and better protect the building structures and ceilings.
All these mounting types have got housings made of cast aluminium; only type AV 50 has got an SC-cast-iron housing.
The cores are all made of aluminium profiles, also the size AV 40 and AV 40L. We start to produce the elements with the inner square made of light metal profile approx. within February 2014. All the dimensions are kept, that means the elements are fully adaptable with the previous version. The previous version is still available as a special element.

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90-11092018-046174

Type HS

The ROSTA Type AB oscillating mountings have created a good name for themselves as screen box suspensions in screening technology thanks to their high isolation effect, high level of lateral stability, security against overload and high resistance to corrosion.

For reasons related to the process, approximately 20 % of all screen and discharge chutes have suspended mounts under material bunkers and metering shafts. ROSTA Type AB oscillating mountings are also often used for the assembly of these vibration units, as a suspended screening machine can be directly connected to silos and bunkers using AB suspensions without having to organise complicated yoke constructions.
The new HS suspensions (hanging screen) have a guide arm geometry that is designed for tensile loads. With ideal loading, the natural frequency of this suspension thereby sinks from its former 5.5 Hz to only approx. 3.5 Hz, which guarantees an isolating effect > 97 %. All HS oscillating mountings are also available in stainless steel (AISI 304) and interchangeable with the blue HS oscillating mountings!

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90-11092018-046365

Type HSI

The ROSTA Type AB oscillating mountings have created a good name for themselves as screen box suspensions in screening technology thanks to their high isolation effect, high level of lateral stability, security against overload and high resistance to corrosion.

For reasons related to the process, approximately 20 % of all screen and discharge chutes have suspended mounts under material bunkers and metering shafts. ROSTA Type AB oscillating mountings are also often used for the assembly of these vibration units, as a suspended screening machine can be directly connected to silos and bunkers using AB suspensions without having to organise complicated yoke constructions.
The new HSI suspensions (hanging screen) have a guide arm geometry that is designed for tensile loads. With ideal loading, the natural frequency of this suspension thereby sinks from its former 5.5 Hz to only approx. 3.5 Hz, which guarantees an isolating effect > 97 %. All HSI oscillating mountings are in stainless steel (AISI 304) and interchangeable with the blue HS oscillating mountings!

Customer benefits:

  • Direct installation under bunkers = No complicated yoke construction required
  • Low natural frequency of the suspension = Low residual vibrations in the silo structure and the building
  • High lateral stability = Short, controlled and safe run-out of the vibrating machine

 

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Many companies worldwide value our products and recommend them to others. But read for yourself what our customers have to say about their experiences with us.
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Core Technology
The ROSTA Element, an elastomer powered torsional spring, is central to our range of specialised machine components designed to provide a combination of useful functions. ROSTA components offer dependable performance across a broad spectrum of industrial applications.
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Durable outer housing.

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Precision crafted inner section
featuring multiple connection options.

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Specialized, high-performance elastomer compound cords.

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refurbish
Select ROSTA elements are capable of being refurbished by replacing either the rubber cords, the inner mounting or the outer housing. Not only is this efficient, but its great for the environment as well.

Contact Sales to learn more about our refurbishment options.
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Get in touch with us. Find your ROSTA company or the ROSTA distribution partner in your country or nearest to you and let us know how we can support you to make you successful in your market.
+41 (0)62 889 04 00
info.ch@rosta.com
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