S7009 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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S7009 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The S7009 CD/HCP4ADBA is a precision duplex pair of double row angular contact ball bearings designed for the most demanding high-performance applications. This pre-matched and preloaded set (Duplex Back-to-Back arrangement) delivers exceptional system rigidity and rotational accuracy right out of the box. Its construction, featuring ceramic balls and a phenolic cage, is optimized for high-speed operation and the ability to handle significant combined loads (radial and axial loads simultaneously). The sealed design with pre-applied grease ensures long-term, maintenance-free operation, making it an ideal solution for high-reliability spindles and precision machinery.
S7009 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| S7009 | Basic Bearing Series & Size | Denotes a 45mm bore, 75mm OD, 32mm width bearing from a high-precision series. |
| C | 15° Contact Angle | Optimized for high-speed performance with a good balance of radial and axial load capacity. |
| D | Duplex Pair | Indicates two bearings are supplied as a matched set. |
| DB | Back-to-Back Arrangement | Provides high moment rigidity and excellent stability under complex loads. |
| HC | Hybrid Ceramic | Signifies the use of ceramic balls, which reduce centrifugal force, lower friction, and allow for higher speeds and longer service life. |
| P4A | Tolerance Class | Corresponds to ABEC 7 / ISO P4 precision class, ensuring extremely tight dimensional and running accuracy. |
| A | Light Preload | The bearings are preloaded to eliminate internal clearance, enhancing system stiffness and rotational accuracy. |
S7009 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Accuracy: The duplex back-to-back (DB) arrangement creates a rigid, statically determinate system that effectively resists moment loads and shaft deflection. Combined with the P4A precision tolerance and light preload (A), this configuration guarantees minimal runout and superior positional accuracy for the spindle or shaft.
Superior High-Speed Capability: The hybrid ceramic balls (HC) are significantly lighter than steel balls, drastically reducing centrifugal forces and enabling a limiting speed of 46,000 rpm. The lightweight phenolic cage further contributes to low friction and high-speed stability.
Enhanced Load Capacity and Longevity: The double row design provides a high radial dynamic load rating of 10,530 lbf and can accommodate bidirectional axial loads. The combination of ceramic balls and high-grade chrome steel rings results in lower operating temperatures and dramatically extended bearing service life, especially in high-speed applications.
Maintenance-Free Operation: The sealed design effectively protects against contamination and retains the high-performance grease, ensuring consistent lubrication and reliable performance throughout the bearing's operational life without requiring re-lubrication.
S7009 CD/HCP4ADBA Bearing Typical Application Areas
- High-Frequency CNC Spindles for milling, grinding, and drilling
- Precision Machine Tool Main Shafts
- High-speed Robotic Arm Drives and Servo Motors
- Aerospace instrumentation and auxiliary power units
- High-performance Turbocharger Shafts
