71911 CD/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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71911 CD/HCP4AQBCA Bearing Product Overview & Core Advantages
The 71911 CD/HCP4AQBCA is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set of four bearings in a back-to-back (QBC) arrangement provides superior stability under combined loads, effectively handling radial and axial forces simultaneously. Manufactured to P4A tolerance class with a 15° contact angle and ceramic balls, it delivers outstanding high-speed performance and operational precision, making it ideal for high-reliability, high-rigidity systems.
71911 CD/HCP4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing series and size designation |
| CD | 15° contact angle design |
| HC | Hybrid ceramic construction (steel rings with ceramic balls) |
| P4A | High precision tolerance class (superior to ABEC 7) |
| QBC | Quadruplex back-to-back matched arrangement |
71911 CD/HCP4AQBCA Bearing Structural Features & Performance Benefits
Exceptional Rigidity: The quadruplex back-to-back configuration creates an extremely rigid bearing system that minimizes deflection under heavy combined loads, ensuring precise shaft positioning and system stability.
Superior High-Speed Capability: Featuring ceramic balls and a phenolic cage, this bearing achieves reduced centrifugal forces and lower operating temperatures, enabling limiting speeds up to 39,000 rpm while maintaining precision.
Enhanced Load Capacity: With a radial dynamic load rating of 11,408 lbf and static load rating of 13,162 lbf, this bearing sustains significant radial and axial loads simultaneously, supported by the optimized 15° contact angle.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for high-precision applications.
71911 CD/HCP4AQBCA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and precision grinding spindles requiring extreme rigidity and accuracy
- High-Speed Motors: Electric motors and generators operating at elevated speeds where ceramic hybrid technology reduces wear
- Aerospace Systems: Critical rotating components in aircraft systems demanding reliability at high rotational speeds
- Precision Instrumentation: Medical equipment, measuring devices, and laboratory instruments requiring minimal vibration and runout
- Robotics and Automation: High-precision robotic arms and automation equipment where positional accuracy is critical
