What are the Main Factors that Affect the Rated Life of Bearings?

There are many factors that affect the rated life of a bearing, in addition to the type of bearing, structural design, and reliability requirements (can be corrected by multiplying the reliability life correction factor a1) and materials (such as cleanliness, hardness, surface structure, fatigue limit, temperature), lubrication (such as viscosity, bearing speed, bearing size, lubricant type, additives), environment (such as the degree of pollution, humidity), impurity particles (such as hardness, size, shape, material), internal stress in the collar (such as manufacturing process generated, after the installation of the collar interference generated by internal stress), installation (such as assembly and disassembly damage, different heart), bearing load and other factors, these factors can be corrected by multiplying the life correction factor aiso.

Previously, considering the influence of material and lubrication on bearing life, the special bearing performance life correction coefficient a2 and operating conditions life correction coefficient a3, because a2 and a3 are interrelated, therefore, many bearing manufacturers use a combined coefficient a23. now due to the introduction of aiso coefficient, the scope of the combined coefficient a23 has been extended to include other related factors. However, the aiso coefficient is determined by a combination of computer application theory and test techniques and practical experience.

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