71911 CE/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71911 CE/P4ADBA Bearing Product Overview & Core Advantages
The 71911 CE/P4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex back-to-back (DB) matched set features an Extra Light (Class A) preload and adheres to the stringent P4A tolerance class, ensuring superior running accuracy and minimal vibration. Its primary advantage lies in its ability to handle combined radial and axial loads simultaneously with high rigidity, making it ideal for high-speed spindles and other precision machinery where positional stability is critical.
71911 CE/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 71911: Basic designation indicating a metric, angular contact ball bearing with a 55 mm bore, 80 mm OD, and 26 mm width.
- CE: Denotes a duplex bearing with a 15° contact angle and specific internal design optimizations.
- P4A: Specifies the tolerance class, indicating very high precision levels for dimensional and running accuracy.
- DB: Indicates the matched arrangement is Back-to-Back, which provides high moment rigidity.
71911 CE/P4ADBA Bearing Structural Features & Performance Benefits
This bearing's performance stems from its sophisticated design. The duplex back-to-back (DB) arrangement of two bearings creates a highly rigid support system that effectively resists moment loads, ensuring shaft stability. The phenolic resin cage is lightweight and robust, contributing to smooth operation at the high limiting speed of 34,000 rpm. Manufactured from chrome steel for both rings and balls, it offers high durability and fatigue resistance. The Extra Light preload (Class A) minimizes deflection under light loads, enhancing precision and reducing heat generation at high speeds. With a dynamic load rating of 5648 lbf and static load rating of 4770 lbf, it delivers reliable performance under significant combined loads.
71911 CE/P4ADBA Bearing Typical Application Areas
The 71911 CE/P4ADBA is engineered for high-performance applications where precision and speed are paramount. Typical uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
