FROM ROSTA’S EXPERTS
SUSPENSION CHALLENGESOUR INDUSTRY INSIGHTS

WHEN THE TOOLS SAVE THE CROP
The correct preparedness of farming fields allows for
successful seed planting in order to produce a robustand bountiful crop.
In order to prepare the fields correctly, proper
operation of your equipment is essential.
Sometimes mother nature does not want to play fair,so there exists only a small window of opportunity
exists for the farmer and so their equipment must beable to perform correctly and efficiently.
Reliable suspension systems on high speed tillage
equipment provide continuous correct down pressureof the discs to ensure the proper depth of cut, whileturning of the residual crop and soil in order to blend
the nutrients back into the ground.
Sometimes there are different ground hardness’ oroccasional rocks that over time begin to surface andcan cause extreme and expensive damage to theequipment. In such cases, the suspension needs tocompensate for these factors.
ROSTA ADVANTAGESOUR EXPERTISE

1. Continuous and correct downpressure of the discs

ROSTA’s experience in working with equipment
manufacturers has provided us with insights into theirconcerns and needs to provide efficient products tothe farmer, dependable for uninterrupted operation
when needed.

2. Allowance for resistance ofangular pressures by the discs

3. Compensation of shock loads
and impacts when hitting rocks, with Specialised rubber technology, offered by ROSTA,a quick return to operating position
can successfully address the challenges describedabove. Moreover, it has the potential to optimise
4. Maintenance free components
the performance of the equipment and provide
a long, maintenance free operational lifespan.
5. Longevity of the equipment

WHO IS ROSTA?
75 YEARS OF
The ROSTA Group have designed and manufactured
EXPERIENCE,
rubber suspension components for over 75
SWISS ENGINEERING specialised
years, for a variety of industries and applications.
EXCELLENCE FOR
We provide engineering support to help ensure
correct combinations of mountings and rubber cord
RUBBER SPRINGS. theperformance, and dimensions are used. Our in-house

SIMPLY
THE BLUE ONESFROM ROSTA.

laboratory is able to conduct torque and FEA testing for
performance assurances for the given application.
We have our own rubber manufacturing facility within-house chemists and engineers constantly developing& testing new rubber compounds to meet industry
demands.

OUR ELEMENT
We are the global leader in the supply of bothstandardized and customized torsional elastomer spring
based solutions. ROSTA has successfully delivered
countless projects for our customers around the globe
and gained a comprehensive understanding of ourcustomer’s needs and requirements. Our solutions offer
simple and safe options when it comes to optimizing theperformance of machinery.

=+a vibration
dampera vibration damper++++bearing

THE CORE OF ROSTA RUBBER SUSPENSION ELEMENTS+
a pivotbearing
bearinga pivotdampera acoilspringcoil spring+

ROSTA rubber suspension technology has been provento significantly reduce the total cost of ownership ofassets through their long lasting and maintenancea pivotfree
bearing operation.
a coil spring
The ROSTA Element is the foundation of our productoffering. The uniquely designed torsion spring consistsof an inner square profile and outer square housing
separated by four high quality rubber cords.
Such design allows for the inner square to rotate by up toa coil spring
30° clockwise and anticlockwise in relation to the outersquare, compressing the rubber inserts and generatinga torsional spring force. In a ROSTA suspension solution,
the pre-loaded torsion spring is a store of mechanicalenergy used to exert pressing force on the disc arms.
The release of this stored energy automaticallycompensates for impacts or shock loads, while
maintaining the required force and efficient operationfor extended periods of time.

TYPICAL USE CASESROSTA rubber cords are an ideal solution for cultivator
disc arm suspensions allowing simplified adjustment ofrow spacing for large multi disc machines.
ROSTA offers a high torque value for ideal pressure
against the varying soil conditions and provides superior
damping and shock load reaction when encountering
rocks, to deflect and react back into position duringhigh speed cultivating. Other applications would include
seeder/packer and sprayer arm suspensions.

ROSTA ELEMENT Spring Characteristic

ROSTA Element Pre-loadSeeder / packer wheel combinations

ROSTA ELEMENT Spring Characteristic

Sprayer boom suspensions

THE BENEFITS OF INHERENT DAMPING
Throughout the operation of the equipment, torque peaks
and some shocks or vibration can occur, especiallyduring impacts with rocks or hard surfaces.

Rubber Heating

ROSTA Hysteresis (Energy Dissipation)

A suitably designed ROSTA suspension system can help
protect the equipment and other components from theseforces through a level of inherent damping. When suchforce is experienced, the ROSTA Element’s rubber cords
can further compress. This rapid polymer deformation
converts part of the mechanical energy into heat.
As a result of the energy dissipation, the dynamic
suspension reacts against this with a significantlyreduced force. Damped reaction of the system reduces
damage to the equipment components. This furtherminimizes the risk of unplanned operational downtime.
The damping effect of ROSTA’s technology differs fromother solutions, such as coil spring-based tensioning
systems, where the kinetic energy from a shock load
is returned to the equipment with equal force.

SKS MEKANIIKKA OY
Myynti
Martinkyläntie 50, PL 122, 01721 Vantaa
p. 020 764 5001, tekninen myynti
p. 020 764 5000, vaihdesales.mekaniikka@sks.fi, www.sks.fi