S71909 CD/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71909 CD/P4ADBB Bearing Product Overview & Core Advantages
The S71909 CD/P4ADBB is a metric duplex pair of precision angular contact ball bearings, pre-matched in a back-to-back (DB) arrangement. This configuration is engineered to provide exceptional high rigidity and stability, making it ideal for applications requiring high rotational accuracy and the ability to withstand combined loads (radial and bidirectional axial loads). Manufactured to the stringent P4A tolerance class, it delivers superior running accuracy and consistent performance in demanding, high-speed environments.
S71909 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71909 | Denotes the bearing series and size (45mm bore, 68mm OD, 24mm width). |
| CD | Indicates a duplex pair in a back-to-back (DB) arrangement. |
| P4A | Specifies the tolerance class, representing high precision levels for running accuracy and dimensional stability. |
| DBB | Confirms the universal matched arrangement as Back-to-Back. |
S71909 CD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing system rigidity and moment load capacity, which is critical for maintaining precision under heavy combined loads.
- Superior Load Capacity: The 15° contact angle is optimized to handle substantial radial loads and bidirectional axial loads simultaneously.
- High-Speed Performance: The lightweight and robust phenolic cage ensures stable operation and reduced centrifugal forces, contributing to the high limiting speed of 46,000 rpm.
- Precision & Longevity: Manufactured from high-grade chrome steel for rings and balls, and adhering to the P4A tolerance class, this bearing guarantees minimal vibration, low noise, and extended service life in precision applications.
- Sealed & Pre-Lubricated: The sealed design with factory-applied grease lubrication protects against contamination and provides reliable operation within a temperature range of -30°C to 110°C, reducing maintenance needs.
S71909 CD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing set is ideally suited for applications demanding high speed, rigidity, and accuracy, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Industrial Pumps and Compressors
- Robotic Drives and Positioning Systems
