SUPLEX springs are shot-peened in order to compact the surface and extend the longevity.
SUPLEX goes one step further and subjects the spring to treatment whilst it is assembled. The process is described as stress treatment or exposure treatment.
This careful process is crucial for lightweight design springs and springs which are stark heavily stressed.
Whit the help of a spring tester, a technical data sheet is drawn up (with all parameters) for all new springs which are to be developed. A prototype is created based on these parameters, which has to go through a few test procedures before the spring goes into production. These test mainly consist of
metallographic examinations, mechanical material tests and longevity tests.