71911 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
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71911 CE/HCP4A Bearing Product Overview & Core Advantages
The 71911 CE/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and reliability. As a single-row bearing with a 15° contact angle, it is optimized to handle combined loads, primarily thrust loads with significant radial load capacity. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, while the ceramic ball and phenolic cage construction contribute to high-speed capability, reduced weight, and extended service life. This bearing is preloaded and pre-lubricated, making it ready for high-performance installations where high rigidity and operational stability are paramount.
71911 CE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing series and size designation (55mm bore, 80mm OD, 13mm width). |
| CE | Indicates a 15° contact angle, optimized for high-speed applications requiring high precision. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride), offering advantages in speed, stiffness, and longevity. |
| P4 | Denotes the precision tolerance class (ABEC-7), ensuring minimal runout and vibration. |
| A | Specifies that the bearing is supplied with a preload for enhanced rigidity and precise shaft positioning. |
71911 CE/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables a limiting speed of 43,000 rpm. This hybrid design also provides superior resistance to wear and electrical arcing.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability at high speeds and provides superior guidance for the ceramic balls, contributing to smooth and quiet operation.
- High Rigidity & Load Capacity: The 15° contact angle and preload work in tandem to deliver high system rigidity, minimizing deflection under load. With a dynamic load rating of 3510 lbf and a static load rating of 2385 lbf, it reliably handles significant combined (radial and axial) loads.
- Precision Performance: Manufactured to P4 tolerance, this bearing guarantees exceptional running accuracy, which is critical for applications demanding minimal vibration and high positional repeatability.
- Pre-lubricated & Open Design: The bearing comes pre-lubricated for immediate operation. The open seal type allows for optimal lubrication management in controlled environments or custom lubrication systems.
71911 CE/HCP4A Bearing Typical Application Areas
The 71911 CE/HCP4A is ideally suited for high-performance machinery where speed, precision, and reliability are non-negotiable. Key application fields include:
- High-Speed Machine Tool Spindles: For milling, grinding, and drilling centers requiring high rotational accuracy and rigidity.
- Precision Robotics: In robot arm joints and actuators demanding high-speed movement and minimal backlash.
- Aerospace & Defense Systems: In gyroscopes, navigation systems, and auxiliary power units (APUs).
- High-Frequency Motors and Spindles: For PCB drilling, dental handpieces, and small tool spindles.
- Advanced Medical Equipment: In CT scanners and high-speed centrifuges.
