In General, life of NSK bearings are bearings under actual service conditions (including conditions of work, environmental conditions and conditions of care and maintenance, and so on), to consistently meet the requirements of active work performance and precision of long service period.
NSK bearing failures come in many forms, but most of these failure modes yet no life calculation methods that are available, only the fatigue life and wear life, and micro lubrication life calculation of ways life can be assessed quantitatively.
　　1, fatigue life for lubricated full and other conditions of use under normal conditions, NSK bearings often fail due to fatigue spalling, samples of its fatigue life deadline can find relevant data, prescribed formulas and calculation program out to a certain degree of reliability calculation.
　　2, machine tool's main bearings for large diameter wear life in order to ensure its high stiffness, the size distribution of NSK bearings also, at the end of its far before the fatigue limit is reached, often due to wear and tear and loss of precision that cannot be used, the wear life of these bearings must be possibilities to their length of service. In fact, scene use mostly fail due to excessive wear of the bearing, so wear life issues must also be considered.



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