71911 ACD/HCP4AQBCB
Hybrid Ceramic Super Precision Bearings
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71911 ACD/HCP4AQBCB Bearing Product Overview & Core Advantages
The 71911 ACD/HCP4AQBCB is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set configuration features four bearings arranged in a back-to-back (QBC) duplex pattern, providing superior stability under combined radial and axial loads. Manufactured to P4A super-precision tolerance class with ceramic balls and phenolic cage, this bearing delivers outstanding high-speed performance, thermal stability, and extended service life in precision machinery.
71911 ACD/HCP4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 71911 | Basic bearing series with 55mm bore, 80mm OD | Standard dimension compatibility |
| ACD | Angular Contact Design with 25° contact angle | Optimized for combined loading conditions |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Reduced friction, higher speed capability |
| P4A | Super precision tolerance class | Exceptional running accuracy and minimal vibration |
| QBC | Quadruplex Back-to-Back arrangement | Maximum rigidity and moment load capacity |
71911 ACD/HCP4AQBCB Bearing Structural Features & Performance Benefits
Enhanced Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates an exceptionally rigid bearing system capable of withstanding heavy combined loads and significant moment loads. With a 25° contact angle and four-bearing configuration, this set provides superior axial and radial load sharing.
High-Speed Performance: The combination of ceramic balls and phenolic resin cage enables outstanding high-speed operation up to 34,000 rpm. Ceramic balls reduce centrifugal forces, lower operating temperatures, and minimize wear, while the phenolic cage offers excellent strength-to-weight ratio and smooth operation.
Precision Engineering: Manufactured to P4A super-precision standards with tight dimensional tolerances (bore: -0.004mm to 0, OD: -0.004mm to 0), this bearing ensures minimal runout and vibration for applications requiring extreme accuracy.
Thermal Stability: The open design with pre-lubrication accommodates a wide temperature range from -30°C to 110°C, making it suitable for various operating environments without performance degradation.
71911 ACD/HCP4AQBCB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision milling applications
- Precision Robotics: Robot arm joints and precision positioning systems requiring high rigidity
- Aerospace Systems: Guidance systems, flight control mechanisms, and auxiliary power units
- Medical Equipment: High-speed dental handpieces, surgical robots, and diagnostic imaging systems
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages, and inspection equipment
- High-Speed Compressors: Turbochargers and precision air compression systems
