What factors affect the service life of self-aligning roller bearings?
Release time:
2025-06-09
What factors affect the service life of self-aligning roller bearings?
The lifespan of self-aligning roller bearings is influenced by multiple factors, including both the design and manufacturing parameters of the bearings themselves, as well as external conditions such as the usage environment and installation/maintenance. Here are the key influencing factors and detailed explanations:
1. Factors related to the bearing's design and manufacturing
Material quality
Steel purity: The quality of bearing steel (such as GCr15) during smelting directly affects the lifespan. Impurities (such as oxides, sulfides) can cause stress concentration and fatigue spalling.
Heat treatment process: Inadequate control of quenching hardness (generally HRC60-65), uniformity, and residual stress may lead to early wear or fracture.
Special material application: For special materials such as stainless steel (for corrosion resistance) and ceramics (for high temperature resistance and low friction), the lifespan is limited by the material properties.
Structural design parameters
Contact geometry between rollers and raceways: The design of contact angle and curvature radius affects the load distribution. Inappropriate parameters can lead to excessive local stress.
Clearance size: Too small clearance is prone to heat and wear, while too large a clearance increases vibration and noise, both of which will shorten the lifespan.
Retainer design: The strength, wear resistance, and fit clearance between the retainer and the rollers affect the stability of the bearing operation and its ability to withstand impact.
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