71903 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Ball & Washer Dimensions
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71903 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 71903 CD/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universal matchable (SU) bearing features a 15° contact angle and extra light preload (Class A), making it ideal for applications requiring minimal deflection and high running accuracy. Its ceramic ball construction and P4A tolerance class ensure superior performance in high-speed and high-rigidity scenarios. The bearing comes pre-lubricated and is capable of handling combined loads efficiently.
71903 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71903 | Basic bearing designation (17mm bore, 30mm OD, 14mm width) |
| CD | 15° contact angle design |
| HC | Hybrid Ceramic (steel rings with ceramic balls) |
| P4A | High precision tolerance class (superior to ABEC 7) |
| DGA | Universal matchable bearing set designation |
71903 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls provides superior performance characteristics including reduced friction, higher stiffness, and extended service life compared to all-steel bearings.
High-Speed Capability: With a limiting speed of 121,000 rpm, this bearing excels in high-speed applications. The phenolic resin cage and ceramic balls contribute to reduced centrifugal forces and lower operating temperatures.
Precision Performance: The P4A tolerance class ensures extremely tight dimensional control, while the extra light preload (Class A) minimizes deflection under load, making it suitable for applications requiring high positional accuracy.
Universal Matching Capability: As a universal matchable (SU) bearing, it can be mounted in various configurations (back-to-back, face-to-face, or tandem) without requiring selective assembly, simplifying installation and maintenance.
71903 CD/HCP4ADGA Bearing Typical Application Areas
- High-speed machining spindles for CNC milling and grinding machines
- Precision instrument bearings in medical and laboratory equipment
- Aerospace components requiring high reliability and temperature stability
- Semiconductor manufacturing equipment spindles and positioning systems
- High-frequency motor spindles and servo motors
- Turbocharger shafts and other high-speed rotating systems
