71910 CBGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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71910 CBGA/HCP4A Bearing Product Overview & Core Advantages
The 71910 CBGA/HCP4A is a single-row angular contact ball bearing engineered for ultra-high precision and performance. Positioned in the P4A super-precision tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its core advantage lies in its ability to support combined loads—significant radial loads alongside high unidirectional axial loads—making it ideal for demanding applications requiring extreme rigidity and minimal runout. The combination of a ceramic ball material and a phenolic cage contributes to superior high-speed capabilities and reduced rotational inertia.
71910 CBGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| C | 15° Contact Angle | Optimized for high-speed operation and moderate axial load capacity. |
| BGA | Phenolic (Bakelite) Cage | Provides excellent high-speed performance, low friction, and is suitable for high-temperature environments. |
| HC | Hybrid Ceramic (Ceramic Balls, Steel Rings) | Enables higher limiting speeds, reduced weight, longer service life, and operation with less lubrication. |
| P4A | Super Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for applications demanding minimal vibration and superior positional control. |
71910 CBGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance class with a 50mm bore diameter and a 72mm outside diameter, this bearing ensures maximum system stiffness and accuracy. The extra light preload (Class A) minimizes axial and radial play, enhancing positional stability.
- Superior High-Speed Performance: The hybrid ceramic design with silicon nitride balls and the lightweight phenolic cage significantly reduce centrifugal forces, allowing for a high limiting speed of 46,000 rpm.
- Enhanced Load Capacity: With a 15° contact angle and a dynamic load rating of 1755 lbf, it efficiently handles combined radial and axial loads. The Universal Matchable (SU) designation allows for precise preload control when mounted in pairs.
- Optimized for Demanding Environments: The open seal type, combined with the inherent properties of ceramic, supports operation within a temperature range of -30°C to 110°C.
71910 CBGA/HCP4A Bearing Typical Application Areas
The 71910 CBGA/HCP4A is specified for high-performance machinery where precision, speed, and reliability are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and radar equipment.
