71911 CE/HCPA9ADT
Hybrid Ceramic Super Precision Bearings
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71911 CE/HCPA9ADT Bearing Product Overview & Core Advantages
The 71911 CE/HCPA9ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional performance. This matched duplex tandem (DT) arrangement features two bearings preloaded against each other, delivering superior axial rigidity and the ability to handle significant combined loads. Manufactured to an ultra-precise PA9A tolerance class and utilizing ceramic balls, it is engineered for high-speed operation and extended service life in critical machinery.
71911 CE/HCPA9ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 CE | Basic bearing designation for a high-precision, 55mm bore angular contact bearing. |
| HC | Indicates Hybrid Ceramic construction, featuring ceramic balls for reduced friction and higher speed capability. |
| PA9A | Specifies the ultra-high tolerance class, ensuring minimal runout and extreme dimensional accuracy. |
| DT | Denotes the Duplex Tandem arrangement, where two bearings are matched and preloaded to share axial loads in the same direction. |
71911 CE/HCPA9ADT Bearing Structural Features & Performance Benefits
Enhanced Rigidity and Load Capacity: The duplex tandem arrangement creates a highly rigid system, significantly increasing axial stiffness. This allows the bearing set to withstand heavy combined loads (radial and axial) simultaneously, making it ideal for applications with high preload requirements.
Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls reduces centrifugal forces, enabling a high limiting speed of 34,000 rpm. The 15° contact angle is optimized for high-speed axial load support.
Precision and Longevity: Manufactured to PA9A tolerances, this bearing guarantees exceptional running accuracy. The hybrid ceramic design offers superior wear resistance and operates effectively within a wide temperature range from -30°C to 110°C.
71911 CE/HCPA9ADT Bearing Typical Application Areas
This high-performance bearing is specifically designed for the most demanding sectors, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring maximum rigidity and precision.
- High-Frequency Motors and Spindles: Where minimal vibration and high rotational accuracy are critical.
- Precision Robotics: In arm joints and rotary actuators that demand high stiffness and rapid response.
- Aerospace and Defense Systems: For gyroscopes, radar systems, and other critical high-speed rotating assemblies.
