S71911 CE/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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S71911 CE/P4A Bearing Product Overview & Core Advantages
The S71911 CE/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single-row bearing with a 15° contact angle, it excels at handling combined loads, particularly high radial loads and unidirectional axial loads. Manufactured to a P4 (ABEC-7) tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed spindles and other precision machinery. The bearing comes preloaded and lubricated from the factory, guaranteeing optimal performance and simplified installation.
S71911 CE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel (AISI 440C) bearing rings and balls |
| 7 | Angular Contact Ball Bearing |
| 1911 | Dimension Series: 19 (Width) & 11 (Bore: 55mm, OD: 80mm) |
| CE | High-Grade Phenolic (Polyamide) Cage, providing excellent high-speed performance and low friction. |
| P4 | High-Precision Tolerance Class (equivalent to ABEC-7), ensuring superior running accuracy. |
| A | 30° Contact Angle (standard for this series, note: specification sheet indicates 15° for this specific model). |
S71911 CE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The optimized single-row design with a 15° contact angle provides robust support against combined radial and axial loads. With a dynamic load rating of 3510 lbf and a static load rating of 2385 lbf, it offers reliable performance in demanding conditions.
- Superior High-Speed Performance: The lightweight phenolic (CE) cage minimizes centrifugal forces and ensures stable operation at the high limiting speed of 24,000 rpm. The optimized internal geometry further reduces friction and heat generation.
- Corrosion Resistance: Constructed from AISI 440C stainless steel, the bearing is inherently resistant to corrosion, making it suitable for applications where moisture or certain chemicals are present.
- Precision and Stability: The P4 tolerance class guarantees tight dimensional control, resulting in low noise, low vibration, and enhanced positional accuracy for the entire system.
- Ready-to-Install: The bearing is supplied with preload and factory-applied lubrication, simplifying the mounting process and ensuring immediate, optimal performance.
S71911 CE/P4A Bearing Typical Application Areas
The S71911 CE/P4A is engineered for high-performance applications where precision, speed, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Medical Equipment: Dental handpieces, surgical power tools.
- Semiconductor Manufacturing: Wafer handling robots, stepper stages.
- Aerospace & Defense: Gyroscopes, navigation systems, auxiliary power units (APUs).
- High-Frequency Motors and Spindles: PCB drilling spindles, small precision electric motors.
