S71909 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71909 CDGA/P4A Bearing Product Overview & Core Advantages
The S71909 CDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of accuracy and performance. Engineered to a P4A tolerance class, it offers exceptional running accuracy and dimensional stability. Its primary advantage lies in its ability to handle combined loads—simultaneously supporting substantial radial loads and axial loads in one direction—making it ideal for high-speed spindles and other precision machinery. The combination of a phenolic cage and high-grade grease lubrication enables superior high-speed performance, while its sealed design ensures long-term reliability and consistent operation.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71909 | Denotes the bearing series and size. "S" typically indicates a super-precision bearing series. |
| CD | Specifies a 15° contact angle, optimized for high-speed operation and high axial load capacity. |
| G | Indicates the bearing is part of a Universal Matchable (SU) set, allowing for precise preload control when mounted with other bearings from the set. |
| A | Signifies an Extra Light preload (Class A), which minimizes friction and heat generation at high speeds. |
| P4A | The tolerance class, denoting extremely tight dimensional and running accuracy standards superior to ABEC 7. |
S71909 CDGA/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing directly to the high limiting speed of 46,000 rpm. This material also offers high strength and resilience under centrifugal forces.
Precision & Rigidity: Manufactured to P4A tolerances with a 15° contact angle, this bearing provides exceptional running accuracy and system rigidity, which is critical for minimizing deflection in precision spindles.
Load Capacity: The optimized internal geometry and high-quality chrome steel construction provide a high dynamic and static load rating, enabling reliable performance under demanding combined radial and axial loads.
Sealed & Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is designed for long-term, maintenance-free operation within its specified temperature range.
S71909 CDGA/P4A Bearing Typical Application Areas
The S71909 CDGA/P4A is engineered for the most demanding high-precision and high-speed applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring and testing equipment requiring minimal runout.
- High-Frequency Motors & Spindles: Applications where rotational accuracy and balance are paramount.
- Aerospace & Defense Systems: Gyroscopes, navigation systems, and other critical rotating assemblies.
