71911 FE/HCP4ALDGA
Hybrid Ceramic Super Precision Bearings
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71911 FE/HCP4ALDGA Bearing Product Overview & Core Advantages
The 71911 FE/HCP4ALDGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and rotational stability. Its extra light preload (Class A) minimizes deflection under light loads, making it ideal for high-speed spindles. The combination of a ceramic ball and phenolic cage enables outstanding high-speed performance with a limiting speed of 34,000 rpm. As a Universal Matchable (SU) bearing, it can be universally paired with another bearing of the same type for simplified mounting and optimal performance in back-to-back (DB) or face-to-face (DF) arrangements.
71911 FE/HCP4ALDGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing series and size designation (55mm bore, 80mm OD, 26mm width) |
| FE | Steel cage design, pressed window type |
| HC | Hybrid Ceramic: Ceramic balls with steel rings |
| P4A | High precision tolerance class (superior to ABEC 7) |
| A | 30° contact angle (standard for this series) |
| LD | Light preload designation |
| GA | Universal matchable (SU designation) |
71911 FE/HCP4ALDGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls provides significant advantages including reduced friction, lower operating temperatures, and extended service life. The ceramic balls are electrically insulating and highly resistant to wear.
Precision Engineering: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, critical for high-precision applications. The tight dimensional tolerances on bore diameter, outside diameter, and width guarantee consistent performance.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and operates effectively at high speeds with minimal centrifugal forces. This, combined with the lightweight ceramic balls, enables the bearing to achieve its impressive 34,000 rpm limiting speed.
Optimized Load Capacity: With an 18° contact angle, this bearing efficiently handles combined radial and axial loads. The dynamic load rating of 5,648 lbf and static load rating of 4,680 lbf provide reliable performance under demanding conditions.
71911 FE/HCP4ALDGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes
- High-Speed Motors: Electric spindles, servo motors, and high-frequency applications
- Precision Instruments: Measuring equipment, optical scanners, and laboratory apparatus
- Aerospace Systems: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and imaging devices
