S71905 CE/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71905 CE/P4ADBA Bearing Product Overview & Core Advantages
The S71905 CE/P4ADBA is a super-precision angular contact ball bearing designed for applications demanding the highest levels of accuracy, rigidity, and speed. As a duplex back-to-back (DB) matched set, it is engineered to accommodate combined loads—simultaneously handling significant radial and bidirectional axial loads. Its P4A tolerance class and extra light preload (Class A) ensure exceptional running accuracy and smooth operation, making it ideal for high-speed spindles and other high-precision machinery where minimal deflection and thermal stability are critical.
Model Code Breakdown
- S7: High-precision bearing series for machine tool spindles.
- 1905: Standard size designation (Bore: 25mm, OD: 42mm, Width: 18mm).
- CE: Internal design code for optimized internal geometry and preload.
- P4A: Tolerance class exceeding ABEC 7/ISO P4, with enhanced running accuracy and dimensional stability.
- DB: Duplex Back-to-Back arrangement, providing high rigidity and moment load capacity.
- A: Denotes Extra Light Preload for minimal friction and optimal high-speed performance.
S71905 CE/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a rigid bearing system that effectively resists moment loads and shaft deflection. The 15° contact angle is optimized for supporting high axial loads in both directions, in combination with radial loads.
Super-Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees extremely tight dimensional and running accuracy, which is essential for applications requiring high positional repeatability and low vibration.
High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, while the extra light preload minimizes heat generation, together enabling a high limiting speed of 83,000 rpm.
Sealed & Lubricated for Life: The sealed design protects against contamination, and the bearing is pre-lubricated with high-performance grease suitable for a temperature range of -30°C to 110°C, ensuring long service life with minimal maintenance.
S71905 CE/P4ADBA Bearing Typical Application Areas
This bearing is predominantly used in high-performance applications where precision and speed are paramount:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Rotary Systems
- High-Frequency Spindles
- Medical & Dental Equipment
- Advanced Robotics
