Analysis of safety factor on shrink fits under static load or impact

Shrink fitting assembly, which is based on the principle of force, are used for transmission of tork by the help of friction between shaft and hub. There are two important limits in terms of safety of shrink fit. One of the limits is minimum tightness value for tork transmission and the other one is maximum tightness value to prevent damage of hub. We must also think more, these values lose their tightness partially in case of deformation of asperity on the surface of shaft and hub. In this study, limits of assembled fit were examined by loading tork. Findings were assessed from the point of safety of shrink fits and losses of tightness in comparison with literature. As result of study, it was reviewed that shrink fits are more safety than calculation based on literature. In the same time, assumptions on losses of asperity are more than adequate.