7218 BEGAY
Single Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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7218 BEGAY Bearing Product Overview & Core Advantages
The 7218 BEGAY is a single row angular contact ball bearing engineered for precision applications requiring high rigidity and reliable performance. This precision bearing is designed to accommodate combined loads, specifically handling significant axial loads in one direction alongside radial loads. Its 40° contact angle optimizes axial load capacity while maintaining operational stability. Manufactured to P6 (ABEC-3) tolerance class, it delivers exceptional running accuracy, making it ideal for high-speed, high-precision machinery where positional accuracy and minimal vibration are critical.
7218 BEGAY Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| 7218 | Standard bore diameter (90 mm), outside diameter (160 mm), and width (30 mm) designation | Defines critical bearing dimensions for proper housing and shaft fit |
| BE | 40° contact angle design | Optimized for high axial load capacity in one direction |
| GA | Special internal design with optimized cage and ball configuration | Enhanced high-speed performance and stability |
| Y | Presence of filling slot (not typically used in standard mounting) | Facilitates special lubrication requirements when needed |
7218 BEGAY Bearing Structural Features & Performance Benefits
Optimized Internal Geometry: The 40° contact angle and precisely calculated shoulder diameters (inner ring: 117.1 mm large-side, 103.06 mm small-side; outer ring: 134.8 mm) ensure optimal stress distribution and high rigidity under combined loading conditions.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, with a brass cage, providing excellent durability, wear resistance, and thermal stability across the operating temperature range of -30° to 110°C.
High-Speed Capability: The combination of precision-ground components, brass cage, and P6 tolerance class enables reliable operation at limiting speeds up to 5,000 rpm, making it suitable for high-speed applications.
Superior Load Capacity: With a dynamic load rating of 26,100 lbf and static load rating of 23,400 lbf, this bearing delivers robust performance in demanding applications requiring high load-carrying capacity.
7218 BEGAY Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring exceptional running accuracy
- Industrial Pumps: Centrifugal pumps and compressor systems where combined radial and axial loads are present
- Precision Gearboxes: High-speed transmission systems demanding reliable angular contact bearing performance
- Material Handling Equipment: Positioning systems and automation equipment requiring high rigidity and precision
- Electric Motors: High-performance motors operating at elevated speeds with significant axial thrust loads
