7203 CD/P4ADBB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 7203 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This metric system bearing features a back-to-back (DB) matched arrangement and a light preload (Class B), making it ideal for handling combined loads including high radial and axial loads from both directions. Manufactured to P4A tolerance class, it delivers superior running accuracy and is pre-lubricated for immediate use in high-speed, high-reliability machinery.
7203 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7203 | Basic bearing series, indicating a 17mm bore, 40mm OD, and 24mm width. |
| C | 15° contact angle, optimized for axial load capacity. |
| D | Duplex (two bearings in a set). |
| P4A | High precision tolerance class, exceeding ABEC 7 standards for superior running accuracy. |
| DB | Back-to-Back arrangement, providing high moment rigidity and stability. |
| B | Light preload (Class B), reducing axial and radial play for precise shaft positioning. |
Structural Features and Performance Benefits
Optimized Duplex Design: The back-to-back (DB) matched arrangement significantly increases system rigidity, effectively resisting moment loads and maintaining shaft alignment under combined radial and axial loads.
High-Speed Capability: The phenolic resin cage ensures low friction and excellent dimensional stability at high rotational speeds, contributing to a limiting speed of 103,000 rpm. The 15° contact angle provides a balanced performance for high-speed applications.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees minimal runout and vibration for precise applications.
Superior Load Capacity: With a dynamic load rating of 3398 lbf and a static load rating of 1868 lbf, the bearing is engineered for demanding operational conditions and long service life.
Pre-lubricated and Ready-to-Use: The bearing comes pre-lubricated, simplifying installation and providing immediate protection, suitable for an operating temperature range of -30°C to 110°C.
7203 CD/P4ADBB Bearing Typical Application Areas
The 7203 CD/P4ADBB is ideally suited for high-precision and high-speed machinery, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
