7005 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7005 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The 7005 CD/HCP4ADBA is a precision duplex angular contact ball bearing set designed for applications demanding exceptional rotational accuracy and rigidity. This back-to-back (DB) matched pair is preloaded to Extra Light (Class A) specifications, ensuring minimal axial and radial play for superior system stability. Its construction, featuring ceramic balls and a phenolic cage, is optimized for high-speed operation and the ability to handle combined loads (radial and axial) simultaneously. This bearing set represents a high-performance solution for the most demanding precision machinery.
7005 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 7005 | Standard bore diameter (25 mm) and series designation. | Defines core bearing dimensions. |
| C | 15° contact angle. | Optimized for carrying significant axial loads. |
| D | Duplex / Matched pair bearing. | Provides preload and increased rigidity. |
| HC | Hybrid Ceramic (Ceramic balls with steel rings). | Enables higher speeds, reduced friction, and longer service life. |
| P4A | Tolerance class P4A (ABEC 7 equivalent). | Guarantees extremely tight dimensional and running accuracy for precision applications. |
| DB | Back-to-Back arrangement. | Offers high moment stiffness and excellent stability. |
| A | Extra Light preload. | Minimizes deflection under light loads for maximum precision. |
7005 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
The performance of the 7005 CD/HCP4ADBA is a direct result of its advanced construction:
- High Rigidity & Preload: The duplex back-to-back (DB) arrangement with an Extra Light preload (Class A) eliminates internal clearance, creating an exceptionally stiff bearing system that resists deflection under combined loads.
- Superior High-Speed Capability: The combination of a lightweight phenolic cage and low-density ceramic (hybrid) balls significantly reduces centrifugal forces, enabling stable operation at the high limiting speed of 103,000 rpm.
- Enhanced Durability & Performance: Ceramic balls are harder, lighter, and more electrically resistant than steel, leading to reduced wear, lower operating temperature, and extended service life, especially in demanding environments.
- Precision Engineering: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for maintaining accuracy in high-precision spindles and machinery.
7005 CD/HCP4ADBA Bearing Typical Application Areas
This high-precision, high-speed bearing set is ideally suited for advanced applications where accuracy and rigidity are paramount, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation equipment.
- Advanced Laboratory & Medical Equipment: Centrifuges and precision analyzers.
