7009 CE/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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7009 CE/P4ADBA Bearing Product Overview & Core Advantages
The 7009 CE/P4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement provides superior stability and can accommodate combined loads (radial and axial loads simultaneously). Manufactured to P4A tolerance class with an extra light preload (Class A), it delivers high running accuracy and is optimized for high-speed operation up to 46,000 rpm. Its compact design and phenolic cage make it an ideal choice for high-precision, high-reliability machinery.
7009 CE/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 performance and moderate axial load capacity. |
| E | Optimized internal design for enhanced load rating and performance. |
| P4A | High precision tolerance class, providing extremely tight dimensional and running accuracy. |
| DB | Duplex Back-to-Back arrangement. Increases moment rigidity and accommodates axial loads in both directions. |
| A | Extra light preload applied to the bearing set, minimizing friction and heat generation for high-speed applications. |
7009 CE/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning.
- Superior Load Capacity: The angular contact design and optimized internal geometry enable the bearing to handle significant combined radial and axial loads simultaneously.
- High-Speed Performance: The lightweight phenolic resin cage, 15° contact angle, and light preload contribute to low friction and low heat generation, enabling a high limiting speed of 46,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with extremely tight bore, outside diameter, and width tolerances, guaranteeing consistent high-precision performance in demanding applications.
- Material Quality: Constructed from high-grade chrome steel for rings and balls, ensuring long service life and durability under high-stress conditions.
7009 CE/P4ADBA Bearing Typical Application Areas
The 7009 CE/P4ADBA is engineered for high-performance applications where precision, speed, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Robotics, aerospace, and high-end automotive transmissions.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
- Measuring and Testing Equipment: Coordinate measuring machines (CMM) and optical scanners.
- Pumps and Compressors: High-speed centrifugal compressors and pumps.
