71903 CD/P4ADGC
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 CD/P4ADGC Bearing Product Overview & Core Advantages
The 71903 CD/P4ADGC is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a moderate preload (Class C) duplex set, it delivers outstanding performance in handling combined radial and axial loads. Manufactured to P4A tolerance class, this bearing is engineered for high-speed operation, making it an ideal solution for high-precision spindles and other critical machinery requiring superior running accuracy and reliability.
71903 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Universal match duplex arrangement with moderate preload |
| P4A | High precision tolerance class with enhanced running accuracy requirements |
| DGC | Pre-lubricated with high-performance grease suitable for the specified temperature range |
71903 CD/P4ADGC Bearing Structural Features & Performance Benefits
Enhanced Rigidity & Load Capacity: The duplex arrangement with moderate preload provides significantly increased system rigidity, enabling precise positioning and excellent stability under combined loads. The 15° contact angle optimizes axial load carrying capacity while maintaining good radial performance.
Super-Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore: -0.004mm to 0, OD: -0.004mm to 0), this bearing ensures minimal runout and vibration for applications requiring the highest levels of rotational accuracy.
High-Speed Capability: The phenolic cage material and optimized internal design contribute to excellent high-speed performance, with a limiting speed of 121,000 rpm. The lightweight cage reduces centrifugal forces, enhancing stability at elevated rotational speeds.
Precision Materials & Construction: Constructed from chrome steel for both rings and balls, the bearing delivers consistent performance and long service life. The precise ball diameter of 3.969mm and arrangement of 14 balls ensure optimal load distribution and smooth operation.
71903 CD/P4ADGC Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Spindle motors, high-frequency motors, and precision drive systems
- Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
