71906 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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71906 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 71906 CDGA/HCP4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional performance. Positioned in the P4A super-precision tolerance class, it delivers superior running accuracy and rotational stability. A key advantage is its universal matchability (SU designation), allowing two bearings to be flexibly mounted in various preload configurations (face-to-face, back-to-back, or tandem) to optimize system rigidity and performance. Its construction with a phenolic resin cage and ceramic balls contributes to low friction, high-speed capability, and extended service life, making it ideal for high-reliability, high-speed spindles and machinery.
71906 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance & Benefit |
|---|---|---|
| 71906 | Bearing series and size designation (30mm bore, 47mm OD, 9mm width). | Defines the compact bearing dimensions. |
| C | 15° contact angle. | Optimized for carrying combined radial and axial loads. |
| DG | Universal Matchable bearing designation. | Enables flexible mounting in pairs to achieve desired preload and system high rigidity. |
| A | Extra Light preload. | Minimizes friction and heat generation, ideal for very high-speed applications. |
| HC | Hybrid Ceramic (Silicon Nitride balls). | Reduces weight, centrifugal force, and friction, enabling higher speeds and longer life. |
| P4A | Super Precision Tolerance Class. | Guarantees extremely tight dimensional and running accuracy for superior performance in precision machinery. |
71906 CDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of ceramic (Silicon Nitride) balls within a chrome steel ring structure significantly reduces rolling friction, inertia, and operating temperature. This directly translates to a higher limiting speed (100,500 rpm) and improved resistance to wear, especially under poor lubrication conditions.
Phenolic Resin Cage: The lightweight and robust phenolic cage ensures stable ball guidance at ultra-high speeds, contributing to smooth operation and reduced vibration.
High Precision & Rigidity: Manufactured to P4A tolerance class and featuring a 15° contact angle, this bearing provides excellent running accuracy and can support significant combined loads. When mounted in a universal pair (SU), the system achieves exceptionally high rigidity, which is critical for minimizing deflection in machining centers and spindles.
Optimized for High-Speed Operation: The combination of the hybrid ceramic design, phenolic cage, and extra light preload makes the 71906 CDGA/HCP4A a premier choice for demanding high-speed bearing applications.
71906 CDGA/HCP4A Bearing Typical Application Areas
- High-Frequency CNC Spindles for milling, grinding, and drilling
- Precision Machine Tool Axles and live tooling
- High-speed Robotic Arm Joints and actuators
- Advanced Aerospace & Defense instrumentation and control systems
- High-performance Medical Device motors and drills
