Bearing Common Sense: Detailed Information on Rolling Bearings

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Rolling bearings are essential mechanical components that support rotating shafts and reduce friction. The key elements of a rolling bearing include the inner and outer rings (ferrules), rolling elements (such as balls or rollers), and the cage that separates the rolling elements. These parts work together to ensure smooth motion while withstanding high contact pressure, sliding, and rotational forces. The materials used in bearings must meet strict performance requirements. The ferrules and rolling elements require high rolling fatigue strength, excellent hardness, and superior wear resistance. The cage, on the other hand, needs good dimensional stability, high mechanical strength, and good machinability. Additionally, depending on the application, the material should also provide impact resistance, heat resistance, and corrosion resistance. Most bearings are made from high-carbon chromium bearing steel, such as JIS SUJ2 or SUJ3, which are widely used globally. These steels are comparable to AISI 52100 (USA), DIN 100Cr6 (Germany), and BS 535A99 (UK). For applications requiring higher impact resistance, carburized steels like chrome steel, chrome-molybdenum steel, or nickel-chrome-molybdenum steel are used. These materials undergo carburizing to create a hardened surface layer while maintaining a tough core, improving the bearing’s durability under heavy loads. To enhance quality, vacuum degassing is often applied during steel production, resulting in cleaner material with lower oxygen content. Proper heat treatment significantly extends the service life of the rolling elements. In special cases, high-speed steel for heat resistance or stainless steel for corrosion resistance may also be used. For the cage, low-carbon steel is commonly used for stamping and forming. In some cases, brass or stainless steel plates are employed. For cutting or machining parts, high-strength brass, carbon steel, or synthetic resins may be chosen based on the specific application requirements. Understanding the material properties and design of rolling bearings is crucial for selecting the right type for different industrial applications. Whether it's in automotive, aerospace, or manufacturing, proper bearing selection ensures efficiency, reliability, and longevity. China Bearing Network provides detailed information and resources to help users make informed decisions about bearing selection and maintenance. Related Articles: - How to Identify Bearing Noise and Determine if an INA Bearing Can Be Used - SKF Bearing Speed Limits and Application Guidelines - Casting Industry Bearings: Purchase and Usage Instructions This article is sourced from China Bearing Network. Previous: Bearing Load Distribution | Next: Methods for Determining Rolling Bearings

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