7009 CD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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Materials
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7009 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7009 CD/P4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This P4A tolerance class bearing features a back-to-back (DB) matched arrangement, providing superior stability and the ability to withstand combined radial and axial loads. With its extra light preload (Class A) and optimized internal geometry, it delivers high running accuracy and is ideally suited for high-speed spindles and other demanding precision machinery.
7009 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7009 | Basic bearing series and size designation (45mm bore, 75mm OD) |
| C | 15° contact angle, optimized for high-speed applications |
| D | Duplex arrangement (two bearings supplied as a matched set) |
| P4A | High precision tolerance class with enhanced running accuracy requirements |
| DB | Back-to-Back mounting configuration for maximum moment rigidity |
| A | Extra light preload class, minimizing friction while maintaining stiffness |
7009 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread between load centers, significantly enhancing the bearing's resistance to moment loads and providing exceptional system rigidity.
Superior Load Capacity: The angular contact design with a 15° contact angle enables the bearing to efficiently handle combined radial and axial loads simultaneously, making it suitable for complex loading conditions.
Precision & High-Speed Performance: Manufactured to P4A tolerance class standards with extra light preload, this bearing ensures minimal runout and vibration. The phenolic resin cage contributes to reduced friction and allows for a limiting speed of 46,000 rpm, ideal for high-speed applications.
Optimized Material Selection: Constructed from chrome steel for both rings and balls, the bearing provides excellent wear resistance and fatigue life. The phenolic cage offers good dimensional stability at high speeds.
7009 CD/P4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring precision and rigidity
- Precision Rotary Tables: Indexing and positioning systems demanding high accuracy
- High-Frequency Spindles: PCB drilling, engraving, and micromachining equipment
- Medical Equipment: Dental handpieces, laboratory centrifuges, and imaging systems
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
