71814 ACD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71814 ACD/P4DBA Bearing Product Overview & Core Advantages
The 71814 ACD/P4DBA is a metric, duplex pair of precision angular contact ball bearings designed for the most demanding applications. This matched Back-to-Back (DB) arrangement provides exceptional system rigidity and stability, enabling it to handle combined radial and axial loads simultaneously. Manufactured to a P4 tolerance class, it guarantees superior running accuracy and is preloaded for immediate, high-performance operation. Its compact design and high load capacity make it ideal for high-speed, high-precision machinery requiring maximum reliability.
71814 ACD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
- 71814: Basic designation indicating a 70mm bore, 90mm OD, and 20mm width.
- ACD: Signifies a duplex pair of Angular Contact bearings in a Back-to-Back (DB) arrangement. This configuration provides high moment stiffness.
- P4: Denotes a very high precision tolerance class, ensuring minimal runout and vibration for smooth, accurate operation.
- DBA: Indicates a specific preload level. In this case, Extra light (Class A) preload, which minimizes friction and heat generation, making it suitable for high-speed applications.
71814 ACD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a wide, rigid support system that effectively resists moment loads and tilting, significantly enhancing the overall stiffness of the spindle or assembly. The 25° contact angle is optimized for carrying substantial axial loads in both directions.
Precision & High-Speed Performance: Built to P4 tolerance standards, this bearing ensures exceptional dimensional and running accuracy. The phenolic resin cage is lightweight and robust, contributing to smooth operation at the high limiting speed of 28,000 rpm, even under preload.
Superior Material & Construction: Both rings and balls are made from high-grade chrome steel, providing excellent fatigue life and wear resistance. The bearings are pre-lubricated for immediate service.
71814 ACD/P4DBA Bearing Typical Application Areas
This high-precision duplex bearing set is engineered for advanced machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Rotary Tables and Indexing Heads
- High-Frequency Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
