7003 CD/P4AQBCD
7000 Series Super Precision Angular Contact Ball Bearings
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7003 CD/P4AQBCD Bearing Product Overview & Core Advantages
The 7003 CD/P4AQBCD is a precision quadruplex angular contact ball bearing designed for applications requiring exceptional rigidity and load capacity. This metric system bearing features a back-to-back quadruplex (QBC) matched arrangement and a Heavy (Class D) preload, making it ideal for high-precision machinery where stiffness and rotational accuracy are paramount. Its P4A tolerance class ensures superior running accuracy, while the optimized design effectively handles combined radial and axial loads.
7003 CD/P4AQBCD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7003 | Basic bearing series designation, indicating bore diameter (17mm), outside diameter (35mm), and width (10mm per single bearing). |
| CD | Indicates a 15° contact angle, optimized for high-speed applications requiring precise axial load capacity. |
| P4A | Specifies the high-precision tolerance class, exceeding standard ABEC 7/ISO P4 requirements for enhanced running accuracy. |
| QBC | Denotes the Quadruplex Back-to-Back matched arrangement, providing maximum system rigidity and moment load capacity. |
| D | Indicates Heavy preload classification, ensuring minimal deflection under heavy operating conditions. |
7003 CD/P4AQBCD Bearing Structural Features & Performance Benefits
Optimized Rigidity & Load Distribution: The quadruplex back-to-back arrangement creates an exceptionally rigid bearing system capable of withstanding heavy combined loads and significant moment loads. This configuration provides superior stability in precision applications.
High-Speed Capability: The 15° contact angle and phenolic cage material enable stable operation at high rotational speeds up to 121,000 rpm, making it suitable for demanding spindle applications.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances (bore: -0.004mm to 0, OD: -0.004mm to 0), ensuring minimal runout and vibration for superior positioning accuracy.
Enhanced Load Capacity: With a dynamic load rating of 4005 lbf and static load rating of 2902 lbf, this bearing delivers reliable performance under substantial operating loads.
Material Excellence: Constructed from chrome steel rings and balls, providing excellent wear resistance and durability in demanding industrial environments.
7003 CD/P4AQBCD Bearing Typical Application Areas
The 7003 CD/P4AQBCD is specifically engineered for high-precision applications requiring exceptional rigidity and accuracy:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Rotary Tables: Indexing and positioning systems
- Industrial Robotics: High-accuracy robot arm joints and rotary actuators
- Aerospace Components: Guidance systems and precision instrumentation
- Medical Equipment: High-speed dental handpieces and surgical tools
- Test & Measurement Equipment: Coordinate measuring machines and optical inspection systems
