The main failure types of four row cylindrical roller bearings, used in rolling mills, are: fatigue flakings, cracks on the raceway surfaces, and the premature damage of cages.
轧机用四列圆柱滚子轴承的主要失效形式及原因是滚道表面疲劳剥落、裂纹和保持架的过早损坏。
This paper comprises of the following parts: 1, To analyze the basic principle, structural features, main failure types and load characteristics of the roller chain of cooling transporter.
本文主要内容包括：1、分析冷却运输机滚子链传动的基本原理、结构特点、主要失效形式及载荷特性。
According to the types of die fracture failure, the main cause of die fracture failure is analyzed from many aspects.
根据模具断裂失效类型，从多方面分析其断裂失效的主要原因。
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