7009 ACE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7009 ACE/HCP4ADT Bearing Product Overview & Core Advantages
The 7009 ACE/HCP4ADT is a precision angular contact ball bearing configured in a duplex tandem (DT) arrangement. This matched pair is engineered for applications requiring exceptional high-speed performance and the ability to handle significant combined loads. Featuring a 25° contact angle, ceramic balls, and a phenolic cage, it delivers superior rigidity and is preloaded for optimal operational accuracy in demanding environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7009 | Basic bearing series and size designation. |
| ACE | Internal design optimized for high-speed and high-rigidity applications. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Denotes a high-precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| DT | Signifies a Duplex Tandem matched set, where two bearings are paired to increase axial load capacity in one direction. |
7009 ACE/HCP4ADT Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends service life, enabling higher limiting speeds (46,000 rpm).
Phenolic Resin Cage: This lightweight and robust cage material offers excellent dimensional stability and low friction, further contributing to the bearing's exceptional high-speed capability.
Duplex Tandem Preload: The bearings are supplied as a preloaded matched set. This configuration provides maximum rigidity and minimizes axial deflection under load, which is critical for maintaining precision in machine tool spindles.
Precision Tolerances: Manufactured to P4A tolerance class with tight bore and outside diameter tolerances, this bearing ensures smooth, quiet, and vibration-free operation.
7009 ACE/HCP4ADT Bearing Typical Application Areas
The 7009 ACE/HCP4ADT is ideally suited for high-performance machinery where speed, precision, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric vehicles and industrial automation.
- Turbochargers and other high-rotational-speed equipment.
