7009 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7009 ACD/HCP4A Bearing Product Overview & Core Advantages
The 7009 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single row bearing is distinguished by its 25° contact angle and P4 (ABEC-7) tolerance class, ensuring superior running accuracy and minimal vibration. Its core advantages include the ability to accommodate high combined loads (radial and axial), facilitated by its optimized internal geometry. The bearing comes preloaded from the factory, eliminating internal clearance for immediate high-rigidity operation, making it an ideal choice for high-speed spindles and other precision machinery where positional accuracy is paramount.
7009 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7009 | Standard bore diameter (45 mm) and dimension series. |
| ACD | Angular Contact Design with a 25° contact angle. |
| HCP4A | Indicates a P4 (ABEC-7) tolerance class and the bearing is supplied with a specific preload (A). |
7009 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The P4 tolerance class and factory-applied preload ensure minimal deflection and high system stiffness, critical for maintaining accuracy under load.
- Superior High-Speed Capability: The lightweight phenolic resin cage and the use of ceramic balls significantly reduce centrifugal forces, enabling the bearing to achieve a high limiting speed of 32,000 rpm. Ceramic balls also offer reduced friction and heat generation.
- Optimized Load Capacity: The 25° contact angle is optimally designed to handle significant axial loads in one direction while also supporting substantial radial loads, making it suitable for combined load conditions.
- Material Excellence: Chrome steel rings provide high durability and wear resistance, while the combination with ceramic balls enhances performance in high-speed and temperature-variable environments.
7009 ACD/HCP4A Bearing Typical Application Areas
The 7009 ACD/HCP4A is specifically designed for high-performance applications where precision and speed are non-negotiable. Its primary uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors and Spindles: Applications requiring minimal runout and high rotational accuracy.
- Medical and Dental Equipment: High-speed handpieces and imaging devices.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other critical instrumentation.
