71903 CDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71903 CDGB/P4A Bearing Product Overview & Core Advantages
The 71903 CDGB/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior dimensional and running accuracy, making it ideal for demanding applications. Its 15° contact angle provides excellent performance under combined radial and axial loads. The bearing comes prelubricated and features a phenolic cage for quiet operation and high-speed capability, achieving a limiting speed of 80,000 rpm.
71903 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71903 | Basic bearing designation indicating size series 71 and 17mm bore diameter |
| C | 15° contact angle design |
| D | Light preload (Class B) |
| G | Universal matching capability (SU designation) |
| B | 40° contact angle (modified from standard) |
| P4A | High precision tolerance class with enhanced running accuracy |
71903 CDGB/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance standards with tight dimensional control (bore diameter tolerance: -0.004mm to 0) ensuring exceptional running accuracy and minimal vibration.
Optimized Load Capacity: The 15° contact angle design enables efficient handling of combined radial and axial loads, with a dynamic load rating of 936 lbf and static load rating of 468 lbf.
High-Speed Performance: The phenolic resin cage provides excellent strength-to-weight ratio, contributing to the bearing's ability to reach 80,000 rpm limiting speed while maintaining stable operation.
Universal Matching Capability: Designed as universal matchable bearings, they can be arranged in multiple configurations (back-to-back, face-to-face, or tandem) to meet specific application requirements for stiffness and load distribution.
Precision Materials: Constructed from chrome steel for both rings and balls, ensuring high durability and consistent performance across the operating temperature range of -30°C to 110°C.
71903 CDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding machine spindles requiring exceptional running accuracy
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Spindle motors and high-frequency applications where rotational precision is critical
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
- Aerospace Components: Guidance systems, gyroscopes, and other precision mechanisms
- Robotics: Precision joints and articulation points in industrial and medical robots
