The sleeve (also referred to as “the body”) is one of the key components of the one way overruning starter clutch. The company will replace the manufacturing technology for internal gear of the starter clutch sleeve. So far, the sleeve has been forged and the internal gear subsequently fabricated by cutting. In the future, cutting technology will be completely replaced by forging. Due to the limitations of forging, the sleeve had to be redesigned and its strength verified. We solved the problem by performing a numerical simulation in which we took into account the carburizing process as well as the mechanical load that occurs when the starter is started. In the results section, we first analysed the stress state after carburization and than after carburization followed by starting of the starter. Based on the analysed stress results, we made a selection of critical locations on the sleeves. For the selected critical locations we used the stress approach to determine the fatigue life of the old and the new sleeves. We found the new sleeve to be well and thoughtfully constructed, considering that in terms of strength it responds better to applicable loads than the old one. The fatigue life of the new sleeve is longer than that of the old one at both critical locations.
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