7009 CB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7009 CB/P4A Bearing Product Overview & Core Advantages
The 7009 CB/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it delivers superior running accuracy, making it ideal for demanding high-speed spindle applications. Its key advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction. The bearing is supplied with a preload and is pre-lubricated, ensuring immediate operational readiness, high stiffness, and optimal performance from the first rotation.
7009 CB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance & Benefit |
|---|---|---|
| 7009 | Standard bearing series designation indicating bore diameter (45 mm) and cross-section. | Defines the core bearing dimensions for fit and housing design. |
| CB | Specific internal clearance and preload class. | Indicates the bearing is supplied with a preload for enhanced system rigidity and precise shaft positioning. |
| P4A | Tolerance class designation (equivalent to ABEC-7). | Guarantees extremely tight dimensional and running accuracy, essential for high-speed and low-vibration operation. |
7009 CB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to a P4 tolerance class with a 15° contact angle and a preload, this bearing provides maximum system stiffness and minimizes deflection under load, which is critical for machining accuracy.
- Superior Load Capacity: The optimized angular contact design efficiently supports combined loads (radial and one-direction axial loads), offering a high dynamic load rating of 2151 lbf.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry enable a high limiting speed of 40,000 rpm.
- Ready-to-Install Convenience: The bearing is pre-lubricated, simplifying installation and ensuring immediate, reliable performance without the need for initial greasing.
7009 CB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, high-frequency motors.
- Robotics: High-accuracy joints and arm linkages.
- Medical Equipment: Dental handpieces, laboratory centrifuges.
