Save space and money


Cellasto® was used for spring components as early as the 1960s. Back then, more than 2,000 different springs were used by automobile manufacturers worldwide.


As a result of its excellent physical properties, this micro-cellular polyurethane elastomer is particularly suitable for use as a dynamic, high-performance component in the chassis area. Features include:


  • Low lateral expansion due to its high volume compressibility meeting the requirements of limited construction space
  • Resistance to low temperature, heat and moisture gives components an extended life span


Progressive properties


High-quality vehicle suspension has progressive spring characteristics, which can be achieved by combining a linear steel coil spring with a progressive Cellasto spring aid.


The outstanding features of these components, which are made of micro-cellular, special polyurethane elastomers, are:


  • Enormous deflection potential with negligible lateral expansion with progressive pressure/compression behavior
  • Minor permanent set under static and long-term, dynamic loads


Solid connection


The steel coil spring on the axle is located between an upper and a lower spring cup, which are inclined towards one another. This spring takes on the shape of an arc.


The Cellasto spring aid is subject to longitudinal and transverse distortion and load, which means that it has to be securely fixed to the chassis. This is achieved by means of a cup with snap-in springs.


The advantage? This assembly unit, consisting of a spring aid and an interposed cup, reduces the amount of effort needed during the final assembly of the vehicle.


Save space


Cellasto components are subject to only slight lateral expansion during deflection. That means Cellasto spring aids can be mounted inside the steel coil spring on the shock absorber piston rod, saving space.


Even during total compression—maximum 80% of the original height of the spring without a load—there is no contact with the steel spring.


Keep it clean


Mounted on the piston rod of the shock absorber, spring aids also protect this area against soiling. In addition, bellows or a protective sleeve, secured to the spring aid, protect the piston rod and the shock absorber seal.


Pneumatic springs


Cellasto offers negligible lateral expansion—the flow holes are not closed—even if the spring aids deflect to the maximum. Cellasto spring aids have sufficient emergency operation properties and can take over all of the suspension work should the pneumatic spring fail.


A special Cellasto recipe must be used to guarantee a large proportion of open cells, even in the case of high densities. This prevents the Cellasto spring aid from being compressed when air-pressure is introduced.