Failure analysis of outer ring cracking of carburized tapered roller bearing. Because of its high output and key parts, the failure reason must be found out in order to avoid the same cracking. In this paper, the causes of cracking are discussed by means of macro analysis, micro analysis and SEM analysis.
In addition to a through crack parallel to the axis on the outer surface of the failed tapered roller bearing outer ring, there are also two scattered fine cracks with large cracks. In addition to the non working areas at both ends and the middle, there are two large wear areas on the ferrule, showing different bright white luster bands. From the edge of the wear area about 20 mm away from the end face, there are many "scale" small straight cracks, the direction is parallel to the big cracks, the length is about 40 mm, most of them are 5-10 mm. These characteristics show that the large through cracks are developed from one of these small cracks.
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