71903 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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71903 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71903 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in a pre-matched duplex set, it enables simplified installation and optimal preload configuration. Its P4A tolerance class ensures ultra-precision operation, while the phenolic cage and optimized 15° contact angle deliver superior high-speed capability and rigidity for combined radial and axial loads.
71903 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 71903 | Precision angular contact bearing series with 17mm bore | High-precision foundation for critical applications |
| CD | 15° contact angle, universal matchable duplex set | Optimized for combined loads and flexible mounting configurations |
| P4A | Ultra-precision tolerance class (ABEC 7 equivalent) | Exceptional running accuracy and minimal vibration |
| DGA | Light preload, universal matching arrangement | Reduced thermal expansion effects and stable operation |
71903 CD/P4ADGA Bearing Structural Features & Performance Benefits
High-Speed Phenolic Cage: The reinforced phenolic resin cage enables operation at limiting speeds up to 121,000 rpm, providing excellent dimensional stability and reduced friction at high velocities.
Precision Ground Components: Manufactured to P4A tolerance standards with bore and OD tolerances of -0.004mm to 0, ensuring exact fitment and minimal runout for precision applications.
Universal Matching Design: As a pre-matched duplex set (SU) with light preload, these bearings deliver immediate optimal performance without additional adjustment, providing enhanced stiffness and accuracy.
Optimized Load Distribution: With 14 precision balls of 3.969mm diameter and 15° contact angle, the bearing efficiently handles combined radial and axial loads while maintaining high-speed capability.
71903 CD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring extreme accuracy
- High-Speed Motors: Precision electric motors and servo drives operating at elevated speeds
- Medical Equipment: Dental handpieces, surgical tools, and laboratory instrumentation
- Aerospace Systems: Guidance systems, gyroscopes, and avionics requiring reliable precision
- Semiconductor Manufacturing: Wafer handling robots and precision positioning stages
