71814 ACD/P4QBCC
71800 Series Super Precision Angular Contact Ball Bearings
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71814 ACD/P4QBCC Bearing Product Overview & Core Advantages
The 71814 ACD/P4QBCC is a precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and load capacity. This P4 tolerance class bearing features a back-to-back quadruplex (QBC) arrangement, providing superior stability under combined radial and axial loads. With its moderate preload (Class C), it delivers optimized stiffness and rotational accuracy, making it ideal for high-precision machinery and high-speed spindles where uncompromising performance is critical.
71814 ACD/P4QBCC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71814 | Basic bearing series and size designation (70mm bore, 90mm OD, 40mm width) |
| ACD | Angular Contact Design with 25° contact angle |
| P4 | High precision tolerance class (superior running accuracy) |
| QBCC | Quadruplex Back-to-Back arrangement with Class C preload |
71814 ACD/P4QBCC 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 vibration damping.
Superior Load Capacity: With a 25° contact angle and four bearing rows, this arrangement provides outstanding capacity for both radial and bidirectional axial loads, making it suitable for applications with complex loading conditions.
High-Speed Capability: The phenolic cage material offers excellent strength-to-weight ratio and smooth operation at the limiting speed of 28,000 rpm, while the optimized internal geometry reduces friction and heat generation.
Precision Performance: Manufactured to P4 tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and consistent performance in precision applications.
71814 ACD/P4QBCC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision milling applications
- Industrial Pumps & Compressors: Multi-stage pumps and high-pressure compressor systems
- Precision Gearboxes: High-torque transmission systems requiring rigid bearing support
- Aerospace Systems: Flight control mechanisms and auxiliary power units
- Robotics & Automation: High-precision robotic joints and positioning systems
