S71911 CE/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71911 CE/P4ADBB Bearing Product Overview & Core Advantages
The S71911 CE/P4ADBB is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This back-to-back (DB) matched set is preloaded to Light / Class B specifications, ensuring optimal stiffness and minimal axial/radial runout. Its primary advantage lies in its ability to handle combined loads—simultaneously supporting significant radial loads and bidirectional axial loads. Manufactured to the stringent P4A tolerance class, it is the ideal solution for high-speed spindles and other high-precision machinery where reliability and performance are critical.
S71911 CE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series with a 15° contact angle.
- 1911: Standard dimension series; Bore: 55 mm, OD: 80 mm, Width: 26 mm.
- CE: Indicates a back-to-back (DB) duplex set with a specific preload (Light / Class B).
- P4A: Denotes a super-precision tolerance class exceeding ABEC 7, with enhanced running accuracy.
- DBB: Duplex Back-to-Back arrangement, providing high moment rigidity.
S71911 CE/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and ensuring exceptional system rigidity.
Superior Load Capacity: The optimized 15° contact angle and double-row design enable the bearing to efficiently support combined radial and axial loads from both directions.
High-Speed Performance: The lightweight and robust phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 34,000 rpm. The standard grease lubrication is suitable for this operational range.
Precision & Longevity: Manufactured from high-grade chrome steel and held to P4A tolerances, this bearing guarantees smooth, quiet operation with extended service life in demanding conditions.
S71911 CE/P4ADBB Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Motors and Precision Spindles
- Industrial Pumps and Compressors
- Robotic Arms and Precision Positioning Systems
