71910 CE/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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71910 CE/HCP4AQBCA Bearing Product Overview & Core Advantages
The 71910 CE/HCP4AQBCA is a high-precision quadruplex angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. This metric series bearing features a back-to-back (QBC) matched arrangement of four bearings, enabling it to withstand significant combined loads (radial and axial loads from both directions) simultaneously. Manufactured to the stringent P4A tolerance class and preloaded to Extra light / Class A, it is engineered for high-speed operation and superior running accuracy in the most demanding machinery.
71910 CE/HCP4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing series and size designation (50mm bore, 72mm OD). |
| C | 15° contact angle, optimized for high-speed performance and axial load capacity. |
| E | Optimized internal design for enhanced performance. |
| HC | Hybrid Ceramic: Ceramic balls combined with steel rings for reduced friction, higher speed capability, and longer service life. |
| P4A | High-Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards, ensuring minimal runout and vibration. |
| QBC | Quadruplex Back-to-Back arrangement. A set of four bearings matched and preloaded to function as a single, highly rigid unit. |
71910 CE/HCP4AQBCA Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The quadruplex back-to-back (QBC) arrangement creates an exceptionally stiff bearing system, capable of handling high moment loads and complex combined loads. This configuration provides stable and precise shaft positioning under heavy operating conditions.
Superior High-Speed Performance: The combination of a lightweight phenolic cage, low-friction ceramic balls (Hybrid), and a 15° contact angle allows for a very high limiting speed of 46,000 rpm. This design minimizes centrifugal forces and operating temperature.
Extended Service Life and Reliability: Hybrid ceramic construction offers inherent advantages including electrical insulation, resistance to wear, and the ability to operate with minimal lubrication. The bearings are supplied pre-lubricated for immediate use and are in an open configuration for application-specific lubrication systems.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, this bearing ensures minimal runout and vibration for ultra-precise applications.
71910 CE/HCP4AQBCA Bearing Typical Application Areas
The 71910 CE/HCP4AQBCA is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and auxiliary power units.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
