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tensioning

Chain Drive Tensioning

Any chain drive requires a tensioning system to compensate for elongation and ensure smooth and quiet operation. Without adequate tensioning, chain drives susceptible to increased wear and premature failure. Automatic tensioning optimises chain drive performance and lifespan. 
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ROSTA SE tensioners and accessories provide you with a simple to install solution which continuously applies tensioning force to the chain drive without the need for manual adjustment, and as with all ROSTA products without zero maintenance.
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.
product selection tool
ROSTA CHAIN TENSIONER & IDLER SELECTOR

Chain Standard

Chain Size

Idler Type

Selection tool recommendations are general in nature and may not be suitable for specific applications and installations. Consider the comprehensive product data and guidelines provided in the ROSTA catalogue and other resources. For further assistance, contact your local ROSTA representative
ROSTA SE TensionerROSTA Chain Idler
SE 15 or SE 18 N3/8" - 10 S
Comments
1. For ROSTA Chain Riders, max chain speed: 1.5m/s
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types
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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Explore ROSTA

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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ACCESSORIES
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.

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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.

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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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90-29102018-039553

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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90-29102018-042682

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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other products
Elastic suspension for all types of screening machines and shaking conveyors. ROSTA offers the widest range of oscillating mountings. From standard mounts to heavy duty. Also available in stainless steel.
contact us
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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