S71916 ACD/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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S71916 ACD/P4ADBB Bearing Product Overview & Core Advantages
The S71916 ACD/P4ADBB is a precision duplex back-to-back angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This P4A tolerance class bearing is preloaded and matched as a set, enabling it to handle combined radial and axial loads from both directions simultaneously. Its compact design, featuring a phenolic cage and factory-applied grease lubrication, makes it an ideal solution for high-speed, high-rigidity spindles and precision machinery where reliability and long service life are critical.
S71916 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71916 | Precision angular contact ball bearing series with 80mm bore, 110mm OD. |
| ACD | Duplex arrangement in Back-to-Back (DB) configuration, providing high moment rigidity. |
| P4A | High precision tolerance class with enhanced running accuracy requirements. |
| DBB | Indicates the bearing set is universally matchable (though specification states "No", this suffix typically implies matching). |
S71916 ACD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing exceptional stiffness. This configuration, combined with a 25° contact angle, enables the bearing to support substantial combined radial and axial loads.
High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry and grease lubrication contribute to a high limiting speed of 28,000 rpm, making it suitable for demanding high-speed applications.
Precision & Longevity: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width. The sealed design and pre-lubrication ensure consistent performance and protect against contamination, extending service intervals.
S71916 ACD/P4ADBB Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where precision and speed are paramount. Key applications include:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Motors and Precision Spindles
- Industrial Pumps and Compressors
- Robotic Drives and Precision Gearboxes
