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Roller bearings consist of a raceway and rolling elements. One side is subjected to high contact pressure, while the other side experiences rolling contact with the raceway. The cage supports the rolling elements and can be positioned either between the raceway and the rolling elements or on one side where sliding occurs. It also withstands tension and compression. Therefore, the requirements for the bearing’s components—raceway, rolling elements, and cage—are essential.
**Functions Required for Raceways and Rolling Elements:**
- High rolling fatigue strength
- High hardness
- Excellent wear resistance
- Strong functionality
- Good stability
- High mechanical strength
- Good processability
- Impact resistance
- Heat resistance
- Corrosion resistance
**Material Information for Raceways and Rolling Elements:**
Raceways and rolling elements are typically made from high-carbon chromium bearing steel. Common grades include SUJ2 and SUJ3, which are standardized globally. For example, SUJ2 corresponds to AISI 52100 (USA), DIN 100Cr6 (Germany), and BS 535A99 (UK). In cases requiring higher impact resistance, materials like chrome steel, chrome-molybdenum steel, or nickel-chrome-molybdenum steel may be used. Carburizing treatment can enhance surface hardness and improve fatigue life. NSK uses vacuum degassing to ensure high cleanliness and quality.
In addition to standard bearing steels, special applications may use high-speed steel for heat resistance or stainless steel for corrosion resistance.
**Cage Material Information:**
Cages are usually made from low-carbon steel for stamping. Other materials include brass plates, stainless steel, or synthetic resins for cutting or forming.
**Types of Bearings and Their Applications:**
- **Cylindrical Roller Bearings:** Provide high radial load capacity and are suitable for heavy loads and high-speed rotation. They allow axial movement, making them ideal for thermal expansion and misalignment.
- **Tapered Roller Bearings:** Used in applications requiring both radial and axial loads. They come in single-row and double-row configurations, with different cone angles for varying axial load capacities.
- **Spherical Roller Bearings:** Feature self-aligning properties, making them suitable for misaligned shafts. They can handle heavy radial and axial loads.
- **Thrust Bearings:** Designed to support axial loads only. They are commonly used in automotive and industrial applications.
**Common Cage Types:**
- Steel stamping cages
- Brass or phenolic resin cutting cages
- Synthetic resin forming cages
- Pin-type cages
**Applications of Bearings:**
Bearings are used across a wide range of industries, including automobiles, machine tools, power generation, construction equipment, and more. Specific types are chosen based on load, speed, and environmental conditions.
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**Related Bearing Knowledge:** - Adjustable vertical rolling ball bearing heating method and device - INA joint bearing - NSK bearing ring raceway grinding This article links to [http://](http://) Please indicate the source: [China Bearing Network](http://) Previous: Sliding Bearing Primary Fault Rule Next: The Characteristics of Spiral Spring Bearing Retracting Spiral Spring Bearing
Bearing Information
Source: China Bearing Network | Time: 2014-05-04
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**Related Bearing Knowledge:** - Adjustable vertical rolling ball bearing heating method and device - INA joint bearing - NSK bearing ring raceway grinding This article links to [http://](http://) Please indicate the source: [China Bearing Network](http://) Previous: Sliding Bearing Primary Fault Rule Next: The Characteristics of Spiral Spring Bearing Retracting Spiral Spring Bearing
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