Mechanical failure prediction and analysis of a rubber drying machine speed reducer output shaft under alternating loads and aggressive environment.

The frequent failure of a high strength speed reducer output shaft was the origin of this work. First, the material was analyzed at the laboratory and the failed cross section was evaluated by means of microscopy. As a result of these evaluations and following the FITNET procedure, several failure mechanisms were identified and classified. In the end, preventive and corrective actions were proposed in order to prevent the failure.