7309 BECBM
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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7309 BECBM Bearing Product Overview & Core Advantages
The 7309 BECBM is a high-precision single row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This precision bearing is designed to accommodate combined loads, simultaneously supporting high radial loads and substantial axial loads in one direction. Its P6 (ABEC-3) tolerance class ensures reliable operation in high-speed scenarios, making it an ideal choice for applications where high rigidity and rotational accuracy are paramount. The optimized 40° contact angle provides superior axial load capacity while maintaining excellent high-speed characteristics.
7309 BECBM Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7309 | Standard Bearing Series & Size | Indicates a medium series bearing with 45mm bore, 100mm OD, and 25mm width. |
| BE | High Capacity & Optimized Internal Design | Enhanced internal geometry for increased load ratings and improved performance. |
| C | 40° Contact Angle | Provides high axial load capacity, suitable for applications with significant thrust loads. |
| BM | Brass Cage, Machined | Ensures dimensional stability and reliable performance at high speeds and temperatures. |
7309 BECBM Bearing Structural Features & Performance Benefits
Optimized Internal Geometry: The BE design incorporates larger ball complements and optimized raceway curvature, significantly increasing the radial dynamic load rating (13,725 lbf) and radial static load rating (9,112 lbf) for enhanced service life under heavy loads.
High-Speed Capability: The machined brass cage (BM) provides excellent guidance and stability, contributing to the high limiting speed of 11,000 rpm. The precise bearing dimensions and P6 tolerance class minimize vibration and heat generation.
Superior Rigidity & Load Distribution: The 40° contact angle and robust construction deliver high axial and radial stiffness, making this bearing ideal for applications requiring precise shaft positioning and resistance to deflection under combined loads.
Wide Operating Range: Constructed from high-grade chrome steel for both rings and balls, this bearing operates reliably within a temperature range of -30°C to 110°C, ensuring performance in various industrial environments.
7309 BECBM Bearing Typical Application Areas
This angular contact ball bearing is widely used in precision machinery and high-performance systems, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring precision and rigidity.
- High-Speed Pumps & Compressors: Where reliable operation under combined radial and axial loads is critical.
- Precision Gearboxes: Providing accurate shaft positioning and supporting high thrust loads.
- Industrial Robotics: In joint and arm applications demanding high moment load capacity and precision.
- Medical Equipment: For high-speed centrifuges and imaging systems requiring smooth, quiet operation.
