7003 CD/HCP4ADBB
Hybrid Ceramic Super Precision Bearings
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7003 CD/HCP4ADBB Bearing Product Overview & Core Advantages
The 7003 CD/HCP4ADBB is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement is preloaded to Light / Class B specifications, providing superior system stiffness and minimizing axial and radial runout. Its construction with a phenolic cage and ceramic balls enables outstanding high-speed performance, making it ideal for machine tool spindles and other high-precision machinery.
7003 CD/HCP4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| 7003 | Basic bearing series, with 17mm bore, 35mm OD, and 20mm width. |
| CD | Indicates a duplex bearing in a back-to-back (DB) arrangement. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Denotes a high-precision tolerance class (superior to ABEC 7). |
| DBB | Confirms the back-to-back duplex mounting and universal matching. |
7003 CD/HCP4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a rigid bearing system that can withstand combined loads (radial and axial) from both directions, significantly increasing moment stiffness.
Superior High-Speed Capability: The lightweight phenolic cage and low-density ceramic balls reduce centrifugal forces, allowing for a very high limiting speed of 103,000 rpm. The 15° contact angle is optimized for high-speed operation.
Extended Service Life & Thermal Stability: Hybrid ceramic construction provides excellent wear resistance and operates effectively within a wide temperature range (-30°C to 110°C). The bearings are pre-lubricated for immediate use.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore, outside diameter, and width for precise fit and minimal vibration.
7003 CD/HCP4ADBB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: CNC rotary tables and indexing heads.
- High-Frequency Motors: Spindles for PCB drilling and routing.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and optical aiming devices.
