对开裂的轴套进行了宏观分析，根据其表面明显的犁沟和尺寸减小特征判断其一级失效模式主要为磨损失效。扫描电镜形貌观察结果发现磨损区域存在周向分布的、大致平行的微裂纹，同时存在致密的黏屑和磨痕。能谱分析发现这些磨屑成分与轴套成分存在较大差异，是从与其配合的构件上迁移而来，即轴套和固定轴承的导流壳（过轴孔部位）之间发生了黏着磨损，并最终导致了轴套的开裂。通过加大过轴孔内径较好地解决了轴套磨削与开裂的问题。

Macro analysis was done to the cracked sleeve, and according to the obvious characteristics of furrows and size reduction it was concluded that the first failure mode of the sleeve was mainly wear failure. SEM observation results show that there were roughly circumferential parallel microcracks in the wear area, as well as dense sticky scales and wear marks. Energy spectrum analysis found that there was a large difference between the compositions of these scales and the sleeve, which show that the scales were migrated from its matching component. It can be concluded that adhesive wear occurred between the sleeve and the guide shell (bearing hole) used to fix the bearing, which eventually led to the cracking of the sleeve. The problem of sleeve wearing and cracking was well solved by increasing the inner diameter of the bearing hole.