The requirements concerning the efficiency, exhaust gas emissions and service life of engines are continually increasing. For modern valve train systems, this means that friction losses have to be reduced while the stability under load has to rise at the same time. An important trend in this respect involves valve train configurations with roller actuation. Roller rockers or roller tappets consist of several individual components, each of which has to fulfill different requirements. The cam followers are optimally designed for the high loads in the valve train. In comparison to sliding actuation, cam followers with roller actuation reveal a significant improvement in the wear characteristics. Components of this type are machined on highly flexible revolving transfer systems, fully automatically mounted and tested.
