7009 CD/HCP4AQBCB
Hybrid Ceramic Super Precision Bearings
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7009 CD/HCP4AQBCB Bearing Product Overview & Core Advantages
The 7009 CD/HCP4AQBCB is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set of four bearings, arranged in a back-to-back (QBC) configuration, provides superior stability and can accommodate combined radial and axial loads. Manufactured to P4A tolerance class and featuring ceramic balls and a phenolic cage, it is engineered for high-speed operation and long-term reliability in precision machinery.
7009 CD/HCP4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7009 | Basic bearing series and size designation (45mm bore, 75mm OD). |
| CD | High precision duplex bearing with a specific internal clearance and preload. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Super precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| QBC | Identifies this as a Quadruplex set in a Back-to-Back arrangement. |
7009 CD/HCP4AQBCB Bearing Structural Features & Performance Benefits
- Extreme Rigidity and Stability: The quadruplex back-to-back (QBC) arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, making it ideal for applications where minimal runout is critical.
- Superior High-Speed Performance: The combination of light preload (Class B), a lightweight phenolic cage, and low-density ceramic balls reduces centrifugal forces and operating temperature, enabling a high limiting speed of 46,000 rpm.
- Enhanced Load Capacity: With a 15° contact angle and four bearing rows, this set offers a high dynamic and static load rating for handling significant combined loads.
- Precision and Longevity: The P4A tolerance class ensures exceptional running accuracy, while the open seal type allows for optimal lubrication management in controlled environments, maximizing bearing service life.
7009 CD/HCP4AQBCB Bearing Typical Application Areas
This precision bearing set is specifically engineered for high-performance machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Robotics: Arm joints and high-accuracy rotary tables.
- Aerospace & Defense Systems: Gyroscopes, radar positioning systems, and other critical navigation components.
- High-Frequency Motors and Spindles: For PCB drilling, dental handpieces, and small tool spindles.
