7009 CD/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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Ball & Washer Dimensions
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7009 CD/HCP4AQBCA Bearing Product Overview & Core Advantages
The 7009 CD/HCP4AQBCA is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This metric system bearing features a back-to-back quadruplex (QBC) matched arrangement, enabling it to withstand significant combined loads (radial and axial) from multiple directions simultaneously. Manufactured to an ultra-precise P4A tolerance class and preloaded to Extra Light (Class A), it delivers superior running accuracy, high system stiffness, and optimal performance in high-speed operational environments. Its open design, when properly lubricated, allows for maximum performance in controlled conditions.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7009 | Basic bearing series and size designation (45mm bore, 75mm OD). |
| CD | Indicates a 15° contact angle, optimized for high-speed operation and high axial load capacity. |
| HCP4A | Signifies the bearing is supplied lubricated (H..), features a phenolic resin cage (C), and is manufactured to a P4A tolerance class for exceptional dimensional and running accuracy. |
| QBC | Denotes the Quadruplex Back-to-Back matched arrangement. This configuration provides very high rigidity and moment load capacity. |
| A | Specifies the Extra Light preload (Class A), which minimizes friction and heat generation, making it ideal for very high-speed applications. |
7009 CD/HCP4AQBCA Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The quadruplex back-to-back (QBC) arrangement of four bearings creates an extremely rigid support system, capable of handling heavy combined radial and axial loads as well as high moment loads. This makes the assembly exceptionally stable under complex loading conditions.
High-Speed Capability: The combination of a 15° contact angle, a lightweight and robust phenolic cage, ceramic balls (which reduce centrifugal forces and friction), and an Extra Light preload collectively enable a very high limiting speed of 46,000 rpm. The phenolic cage is well-suited for high acceleration and deceleration.
Precision and Longevity: Manufactured to P4A tolerance class from high-grade chrome steel rings, this bearing ensures minimal runout and vibration. The use of ceramic balls offers advantages in reduced weight, lower thermal expansion, and potential for increased service life in suitable applications.
7009 CD/HCP4AQBCA Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is engineered for the most demanding applications, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotics and Automation Arms
- Advanced Aerospace Systems
- Medical and Dental Drill Handpieces
