7003 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7003 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The 7003 CD/HCP4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex back-to-back (DB) matched set is preloaded to Extra Light / Class A specifications, delivering superior running accuracy and high rigidity. Its construction with a phenolic cage and ceramic balls enables outstanding high-speed performance and reduced rotational inertia. This bearing is engineered to handle combined loads (radial and axial) simultaneously, making it ideal for high-precision, high-reliability machinery where stability under complex loading conditions is critical.
7003 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7003 | Basic bearing series and size designation | Defines the core dimensions: 17mm bore, 35mm OD, 20mm width |
| CD | Duplex Back-to-Back (DB) arrangement | Provides high moment stiffness and excellent running accuracy |
| HC | Hybrid Ceramic (Ceramic balls with steel rings) | Enables higher speeds, reduced friction, and longer service life |
| P4A | High Precision Tolerance Class | Exceeds ABEC 7 standards for dimensional and running accuracy |
7003 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The duplex back-to-back (DB) arrangement with Class A preload creates a highly rigid bearing system that minimizes deflection under load, ensuring exceptional running accuracy and positional stability.
Superior High-Speed Capability: The combination of a lightweight phenolic cage and ceramic (silicon nitride) balls significantly reduces centrifugal forces and rotational mass, enabling the bearing to achieve its impressive limiting speed of 103,000 rpm.
Enhanced Load Capacity: With a 15° contact angle and optimized internal geometry, this bearing effectively handles combined radial and axial loads. The dynamic load rating of 2498 lbf ensures reliable performance under demanding operating conditions.
Optimal Material Selection: The hybrid ceramic construction offers advantages including electrical insulation, reduced thermal expansion, and operation in marginal lubrication conditions, extending the bearing's operational lifespan.
7003 CD/HCP4ADBA Bearing Typical Application Areas
The 7003 CD/HCP4ADBA is specifically engineered for high-performance applications where precision, speed, and rigidity are paramount:
- High-Speed Machine Tool Spindles for precision milling and grinding
- Precision Robotics and automated assembly systems
- High-Frequency Spindles in PCB drilling and routing equipment
- Aerospace Actuation Systems requiring high reliability
- Medical Device Motors and dental handpieces
- Semiconductor Manufacturing Equipment
