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ROSTA products overview

ROSTA has a wide selection of products and services to help you increase your productivity. 
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.

see details

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.

see details

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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90-23102018-055185

Type AD-C

The ROSTA double suspension units type AD-P/AD-C are used for suspending and supporting two-mass shaker systems. The centre point, for frame fixation, is in the middle of the double rocker arm.

The AD-C model is designed to be frictionally engaged in the same way as the AS-C type. The housings and the inner square sections are made of welded steel. The inner square section of the AS-C type are made of aluminium profile.

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90-29102018-035417

Type AD-P

The ROSTA double suspension units type AD-P/AD-C are used for suspending and supporting two-mass shaker systems. The centre point, for frame fixation, is in the middle of the double rocker arm.
The AD-P suspension units are mounted by means of fixing flanges.

The housings and the inner square sections are made of welded steel. The core of the AD-P type is equipped with fixing plates constructed analogously to the AU type.

see details

90-29102018-035529

Type AD-PV

The ROSTA double suspension units type AD-PV/AD-C are used for suspending and supporting two-mass shaker systems. The centre point, for frame fixation, is in the middle of the double rocker arm.
The AD-PV suspension units are mounted by means of fixing flanges.

The housings and the inner square sections are made of welded steel. The core of the AD-PV type is equipped with fixing plates constructed analogously to the AU type.

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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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90-29102018-035714

Type AR

The ROSTA oscillating mountings type AR are maintenance-free elastic joints used for the same purposes as our other oscillating mounting types AU, AS or AD. The distance between the centres can be freely chosen. The commercial circular tube (connection between the two elements) must be supplied by the customer. The inner square profile is frictionally engaged to the machine frame, analogously to type AS-C and AD-C.

The housing of mounting type AR is made of cast aluminium, the core is made of aluminium profile.

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90-29102018-035847

Type AS-C

The ROSTA rocker suspension units type AS-P and AS-C are maintenance-free elastic guide arms used for the same purposes as the oscillating mountings type AU. This low cost model is suitable for fixed distances between the two bearings (rocker length A). The AS-C types are designed to be frictionally engaged to the machine frame. The central mounting allows an easy adjustment of the rocking angle.

The housings are made of welded steel. The inner square section of the AS-C type is made of aluminium profile.

see details

90-29102018-036256

Type AS-P

The ROSTA rocker suspension units type AS-P and AS-C are maintenance-free elastic guide arms used for the same purposes as the oscillating mountings type AU. This low cost model is suitable for fixed distances between the two bearings (rocker length A). The AS-P types are mounted on the trough or the machine frame by means of fixing flanges.

The housings and the inner square sections are made of welded steel. The core of the AS-P type is equipped with fixing plates which are similar to the ones of the AU type.

see details

90-29102018-036772

Type AS-PV

The ROSTA rocker suspension units type AS-PV and AS-C are maintenance-free elastic guide arms used for the same purposes as the oscillating mountings type AU. This low cost model is suitable for fixed distances between the two bearings (rocker length A). The AS-PV types are mounted on the trough or the machine frame by means of fixing flanges.

The housings and the inner square sections are made of welded steel. The core of the AS-PV type is equipped with fixing plates which are similar to the ones of the AU type.

see details

90-29102018-037246

Type AU

ROSTA oscillating mountings type AU are maintenance-free elastic joints for suspending or supporting conveying troughs, screens, sorters and all devices excited by eccentric drives or unbalanced motors with directed oscillations. They are primarily used for installations with an effective distance between the single units (rocker length A) in special designed small serie shakers and troughs, i.e. in cases the spacing of the AS type does not fit the construction.

These AU elements are mounted on the trough by means of fixing flanges. The housings are available with either right- or left-hand threads. They are joined together by means of a threaded rod which must be provided by the customer. The rocker housings are made of die-cast aluminium, AU 50 and 60 types are made of spheroidal graphite cast iron. All cores have fixing plates made of steel.

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90-31072019-037838

Type AUI

ROSTA oscillating mountings type AUI are maintenance-free elastic joints for suspending or supporting conveying troughs, screens, sorters and all devices excited by eccentric drives or unbalanced motors with directed oscillations. They are primarily used for installations with an effective distance between the single units (rocker length A) in special designed small serie shakers and troughs, i.e. in cases the spacing of the AS type does not fit the construction.

These AUI elements are mounted on the trough by means of fixing flanges. The housings are available with either right- or left-hand threads. They are joined together by means of a threaded rod which must be provided by the customer.

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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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90-31072019-039317

Type AWI

ROSTA anti-vibration mounts type AWI are intended for the absorption of medium and low frequency vibrations. The AWI elements are used in pairs (type R and L) in most applications and provide good linear guidance of the vibrating machine part.
These elements are maintenance-free, resistant to water and dirt and suitable for temperatures from -40°C to +80°C. The housing and the inner part are made of stainless steel (AISI 304).

see details

90-03082018-038646

Type BK

ROSTA modules should be connected on machine parts/structures by means of the standardized clamps and brackets. Relevant welded connections would affect (overheat) the rubber inserts and damage the entire suspension device!

The clamps are supplied separately without bolts. They are standardized to fit exactly for the fixation and positioning of the ROSTA rubber suspension units type DK-S and DK-A by frictional force created by the bolted double clamp. For longer units two or more clamps are recommended. All clamps are paint-finished.

see details

90-07092018-039294

Type BR

ROSTA modules should be connected on machine parts/structures by means of the standardized clamps and brackets. Relevant welded connections would affect (overheat) the rubber inserts and damage the entire suspension device!

The clamps are supplied separately without bolts. They are standardized to fit exactly for the fixation and positioning of the ROSTA rubber suspension units type DR-S, DR-A and DR-C without any welding. For longer units two or more clamps are recommended. The clamps are paint-finished.

see details

90-29102018-042877

Type Chain Rider Type P

The high-quality rider is made of friction resistant industrial plastic and allows the use on both rider sides. The max. permissible chain speed should not exceed 1.5 m / sec.

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90-07092018-039707

Type DK-A

Round housing and inner square section made of light alloy profiles, inner square section with four "throughbores", the lever arms can be bolted on and, if necessary, the bores can be tapped, too.

Both ways provide an excellent connection without play which is necessary in order to transmit alternating motion by passing the neutral position in either direction. All metal parts are paint-finished.

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90-07092018-041156

Type DK-S

Round housing and inner square section made of light alloy profiles, inner square section with four "throughbores", the lever arms can be bolted on and, if necessary, the bores can be tapped, too.

Both ways provide an excellent connection without play which is necessary in order to transmit alternating motion by passing the neutral position in either direction. All metal parts are paint-finished.

see details

90-07092018-045533

Type DO-A

Housing up to size 45 made out of light alloy profile, size 50 made out of spheroidal graphite cast iron, inner square section made out of light alloy profile with four "throughbores".

The levers can be mounted on one or both sides by means of bolts. It provides an excellent attachment without play which is most important in order to transmit alternating motions by passing the neutral axis in either direction. All metal parts are paint-finished.

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90-07092018-044526

Type DR-A

Steel housing with inner square section made of light alloy with four small bores. Levers can be mounted on one or on both sides by means of bolts.

Type DR-A with two or four through bores, especially constructed for transmitting alternating motions by passing the neutral axis in either direction. All metal parts are paint-finished.

see details

90-07092018-044885

Type DR-C

Steel housing with inner square section made of light alloy with one big through bore. Levers can be mounted on one or on both sides by means of bolts. Type DR-C with central bore.

The frictional force of this type assures a safe fixation of the lever arms in any position. All metal parts are paint-finished.

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90-07092018-045802

Type DR-S

Housing made out of steel, inner square section made out of steel tube for mounting "plug-in" lever arms on one or both sides. The inserted part should be at least three times longer than the clearance "C".

Up to type DR-S 18 the lever arms can be mounted by one through-bolt and the levers are then fixed by frictional force at any position within 360°. Both ways of fixation are particularly well suited for motions at the plus or minus angular range (no alternating motions across the neutral axis = play). All metal parts are paint-finished.

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90-07092018-049893

Type DW-A 15-38

The housings of the element sizes DW-A 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. Inner square sections made out of light alloy profile with four small through bores or one central through bore.

Levers can be mounted on one or on both sides by means of bolts. Type DW-A with two or four through bores, especially constructed for transmitting alternating motions by passing the neutral axis in either direction. All metal parts are paint-finished.

see details

90-07092018-050659

Type DW-A 45-50

The housings of the element sizes DW-S 45 and 50 are made out of spheroidal cast iron, with inner square sections made out of aluminum. The inner square can be used for mounting "plug-in" lever arms on one or both sides.

The element installation has to be effected by bolting the two support angles on customers machine parts. These elements have especially been constructed for transmitting alternating motions by passing the neutral axis in either direction. All metal parts are paint-finished.

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90-07092018-048995

Type DW-A 60-100

The housings of the element sizes DW-A 45 to 50 are made out of spheroidal cast iron, with inner square sections made out of light alloy profile. Up from size 60, with housings made out of welded steel construction, with inner steel square sections including four threaded bores on each side for the easy fixation of levers and machine parts.

The element installation has to be effected by bolting the two support angles on customers machine part. These elements have especially been constructed for transmitting alternating motions by passing the neutral axis in either direction. All metal parts are paint-finished.

see details

90-07092018-048259

Type DW-C 15-38

The housings of the element sizes DW-C 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. Inner square sections made out of light alloy profile with four small through bores or one central through bore.

Levers can be mounted on one or on both sides by means of bolts. Type DW-C with central through bore. The frictional force of this type assures a safe fixation of lever arms in any position. All metal parts are paint-finished.

see details

90-29042019-037393

Type DW-C 45-50

The housings of the element sizes DW-C 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. Inner square sections made out of light alloy profile with four small through bores or one central through bore.

Levers can be mounted on one or on both sides by means of bolts. Type DW-C with central through bore. The frictional force of this type assures a safe fixation of lever arms in any position. All metal parts are paint-finished.

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90-07092018-047816

Type DW-S 15-38

The housings of the element sizes DW-S 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 parts.

The inner square sections are made out of electrodeposited galvanic zinc coating steel. The inner square can be used for mounting "plug-in" lever arms on one or both sides.

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90-07092018-047627

Type DW-S 45-50

The housings of the element sizes DW-S 45 and 50 are made out of spheroidal cast iron, with inner square sections made out of steel tube. The inner square can be used for mounting "plug-in" lever arms on one or both sides.

The element installation has to be effected by bolting the two support angles on customers machine parts. These elements have especially been constructed for transmitting alternating motions by passing the neutral axis in either direction. All metal parts are paint-finished.

see details

90-02102018-050376

Type ESL

ROSTA anti-vibration mounts type ESL are intended for the absorption of medium and low frequency vibrations and are designed to accept compression, tension and shear loading as well as combined loadings. They can be installed in any desired position and are also ideal for ceiling and wall mounting.

Due to the mechanically secured principle of the anti-vibration mounts type ESL no tearing off is possible. These elements are maintenance-free, insensitive to water and dirt and suitable for temperatures from -40°C to +80°C. The housing and core of the elements up to size 45 are made of light alloy with steel brackets. The housing of size 50 is made of GGG 40. All elements are paint-finished.

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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!

see details

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

see details

90-02102018-050145

Type MB 100

The self-adjusting universal Motor base for friction belt drives with drive power in the 90 kW to 250 kW range (motor frame sizes 315 M to 355 L or NEMA frame sizes 449T and 586/7 = 200-350 HP).

This heavy-duty motor base is supplied fully assembled and ready for use. The two-part motor plate includes as a standard feature the mounting holes for all the motor frame sizes listed above.

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90-26092018-032470

Type MB 27

The ideal standardized motor base for smaller belt drives with electric motors from 0.75 to 4.0 kW (frame size dimensions 90 S/L to 112 M). This base is delivered completely assembled. Thanks to its extremely compact overall dimensions, the type MB 27 can be installed everywhere without any major design changes.

Therefore, the MB 27 is an ideal alternative to obsolete, non-automatic tension rails. The pretensioning device with its left and right-hand thread gives a big positioning range offering an optimum adaption of the working angle to the driven pulley. All steel parts are painted with a blue primer.

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90-26092018-034650

Type MB 38

The new ROSTA motor base type MB 38 for motor frame sizes from 132 S to 160 L (3 to 15 kW) is now available on the drive component market - compact, operatorfriendly, ready for immediate installation and cost-effective. Its new features are, above all, the price, the ready-to-install design and the simplest-possible installation procedure with the new pre-tensioning device.

With the new horizontal aligned finethread adjusting spindle, both the pre-tension and the necessary inclination of the motor plate can be simply adjusted. The ready-to-use construction, the belt track adaptation and the fast clamping system make the MB 38 absolutely revolutionary and extremely user-friendly in comparsion with alternative and predecessor models! The frequently occurring "outside applications" in screen drives, crushers and air conditioning systems have been taken into account through the galvanisation of the components.

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90-02102018-049270

Type MB 50

The type MB 50 is the most universal self-tensioning base for all friction belt drives with 7.5 to 45 kW electric motors (frame size dimensions 160 M S to 225 M). The standardized base plate can be installed on the rubber spring either "centered" or "off-set" according to the position of the driven pulley. The belt pretension can be continuously settled equivalent to the belt size and quantity.

Highlights: The new motor base type MB50 has 2 internal cardanic bushings, powerful front side pre-tensioning device(s) as well as a bolt retainer for easy and safe fixation.

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90-02102018-050010

Type MB 70

The ideal standardized motor base for heavy duty belt drives with electric motors from 37 to 200 kW (frame 250 M to 315 S). This motor bases is available in four different lengths, according to the relevant motor size. The pretensioning device can be attached in 11 different positions, allowing to incline the base plate according to the ideal working angle. The belt pretension can be continuously settled, equivalent to the belt size and quantity. All steel parts are painted with a blue primer.

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90-21092020-043792

Type MB 75

The MB75 features a single, centred pre-tensioning device for easy handling (like the MB100). The hole pattern of the motor plate is equal to the pattern of the baseplate. This enables a previously fix installed motor onto a MB75 without extra efforts. Furthermore, the side plates of the MB75 incorporate extra openings for easier handling during installation.
All three sizes of the MB75 feature a 100 mm offset position of the motor plate, a compact height of 315 mm, galvanized surfaces, the blue painted ROSTA rubber suspension element as well as several labels with information for adjustment procedures, product name and traceability. A QR code stands for getting additional product information.
If no other units are specified, the numbers given are in mm.

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90-29102018-041952

Type N

Machines, apparatus, installations only work as well as they stand! Both machine mount types are equipped with swivel-articulations for the compensation of ground unevenness.

The advantages of these machine mounts are:
shock absorbing, anti-slip, corrosion-resistant, with levelling system

Applications:
For the isolation of vibrations and solid-borne noise, also for machinery and apparatus requiring levelling, such as air conditioning plants, woodworking machinery, pumps, tanks, containers, transport systems, tooling machines, asssembly lines and workshop equipment.

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90-15032021-054532

Type NOX

Machines, apparatus, installations only work as well as they stand! Both machine mount types are equipped with swivel-articulations for the compensation of ground unevenness.

The advantages of these machine Mounts are:
food safe, corrosion-resistant (1.4301/1.4305), antibacterial

Applications:
For the isolation of vibrations and solid-borne noise, also for machinery and apparatus requiring levelling, such as air conditioning plants, woodworking machinery, pumps, tanks, containers, transport systems, tooling machines, assembly lines and workshop equipment.

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90-29102018-039553

Type Roller Type R

The roller is made of high-quality industrial plastic material with two self-lubricating ball bearings 2Z.C3.

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90-29102018-039708

Type Roller Type RL

The tensioning roller is made of industrial plastic material with two self-lubricating ball bearings 2Z.C3 and is designed for light-duty drives.

Plastic material: PA 6, black

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90-29102018-039785

Type SE

The tensioning element with the specification SE (SE 11 to SE 50) is the mostly used standard unit for tensioning of all kind of chain and belt drives. The elastomeric inserts are based on a high elastic natural rubber with a good shape memory. This unit is designed for applications in temperatures from -40° to +80°C (-40° to +180°F)

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90-29102018-039970

Type SE-B

The ROSTA tensioning element type SE-B (Boomerang) compensates the slack in extremely long chain drives. The Boomerang with its bended double arm, equipped with two sprocket wheels, offers a triple compensation of the slack.

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90-29102018-040048

Type SE-F

The ROSTA tensioning elements type SE-F is designed for front mounting applications on "blind" frame structures. Rubber quality, tensioning pressure, material and surface protection are identical to the type SE. The special fixation screw with distance bushing is zinc-plated and secured in the housing by means of a rubber 0-ring.

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90-29102018-040219

Type SE-FE

The ROSTA tensioning element type SE-FE is designed for front mounting applications on engines such as cooling compressors and fan drives. Steel parts are black painted.

Today nearly all busses for passenger transport are equipped with an air-conditioning system. The diesel engine of the bus serves thereby as energy source of the cooling compressor. The piston- or rotation compressors are driven via V- or Poly-V belts from the spur wheel of the main engine. This belt transmission requires a slippage-free power train to ensure the full capacity of the cooling compressors.

ROSTA designed for this specific application a heat resistant tensioner - powerful, compact with a long compensation travel.

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90-29102018-040641

Type SE-G

The tensioning element type SE-G (marked with yellow dot) has zinc-plated steel parts and therefore is specially designed for "outdoor" applications; e.g. for building machines.

In addition, the type SE-G is equipped with oil resistant synthetic inserts for applications in oily areas, like in gear-boxes and crank-cases.

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90-29102018-040733

Type SE-I

The ROSTA tensioning elements type SEI are all made out of stainless steel. They are available off-the-shelve in four different sizes: SEI 15, 18, 27, housing in SS casted version, SEI 40 (similiar to SE 38), housing in SS welded version.

The stainless steel quality complies with the DIN 1.4301 and AISI 304 specifications. These tensioning elements have been pirmarily designed for applications in the food industry and the chemical process technology.

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90-29102018-040818

Type SE-R

Tensioning element with strengthened tensioning arm. Arm and inner core especially welded for use on combustion engines and compressors. Steel parts with blue lacquering. Marked with white ring. Housing and inner core made out of steel, inserts Rubmix 10.

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90-29102018-041839

Type SE-W

The tensioning element type SE-W (marked with red dot) is equipped with heat resistant elastomeric inserts. It is developed for applications in temperatures from +80° to +120°C (+180° to 250°F), such as belt tensioners for diesel engines, chain tensioner in driers, belt scraper in hot surroundings, etc.

Due to the characteristics of the elastomeric compound, the resulting tension pressure of the type SE-W reduces by 40%, compared to the standard type SE and the type SE-G.

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90-08112018-039764

Type ST

ROSTA oscillating drive heads type ST are flexible joints transmitting the acceleration forces from eccentric drive to the oscillating machine part - free of play, silently, reliably and without requiring maintenance. The common maintenance problems which are characteristic of these drive components are thus eliminated.

The inner square section (core) and the trough are joined together by a so-called "fork". The outer housing is screwed to the slider crank rod and locked. Right- or left-hand threads are available, which allows the crank length to be adjusted easily. The drive heads up to type ST 45 have got an aluminium housing and core; type ST 50 has a housing made of SC iron and an aluminium core; ST 60 and ST 80 have an SC iron housing and a steel core.

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90-31072019-039935

Type STI

ROSTA oscillating drive heads type STI are flexible joints transmitting the acceleration forces from eccentric drive to the oscillating machine part - free of play, silently, reliably and without requiring maintenance. The common maintenance problems which are characteristic of these drive components are thus eliminated.

The inner square section (core) and the trough are joined together by a so-called \"fork\". The outer housing is screwed to the slider crank rod and locked. Right- or left-hand threads are available, which allows the crank length to be adjusted easily.
The drive heads are made out of aluminium.

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90-02102018-050688

Type V

ROSTA anti-vibration mounts type V are multi-directional dampers and are designed to accept compression, tension and shear loading as well as combined loadings. They can be installed in any desired position and are also ideal for ceiling and wall mounting.

Due to the mechanically secured principle of the anti-vibration mounts type V no tearing off is possible. These elements are maintenance-free, insensitive to water and dirt and suitable for temperatues from -40°C to +80°C. The core is made of light alloy, the outer housing and brackets of steel. All elements are paint-finished.

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90-29102018-042682

Type Wheel N

The sprocket wheel runs on a self-lubricating ball bearing 2Z.C3.

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90-29102018-041952

Type Wheel set - type N

The ROSTA sprocket wheel set completes the tensioning element for applications in chain drives. The sprocket wheel runs on a self-lubricating ball bearing 2Z.C3.

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90-07092018-047466

Type WS

ROSTA modules should be connected on machine parts/structures by means of the standardized clamps and brackets. Relevant welded connections would affect (overheat) the rubber inserts and damage the entire suspension device!

This multi-purpose brackets make an easy screw connection possible on the inner squares of the ROSTA rubber suspension units type DR-A, DK-A and DO-A (as well as a housing fixation of the tensioner devices type SE). The base of the angle section can be positioned in both directions and offers together with the different clamps many combination possibilities of the element assembling. The brackets are paint-finished.

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