S71908 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71908 CD/P4A Bearing Product Overview & Core Advantages
The S71908 CD/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. This metric precision bearing features a P4 (ABEC-7) tolerance class, ensuring minimal runout and superior performance in demanding operational environments. Its key advantage lies in its ability to accommodate combined loads—significant radial loads alongside substantial one-direction axial loads—thanks to its defined 15° contact angle. Pre-loaded and pre-lubricated from the factory, it offers immediate high rigidity and is ready for installation, making it an ideal, compact solution for high-speed spindles and precision mechanisms.
S71908 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71908 | Basic bearing designation indicating a single-row angular contact ball bearing with a 40mm bore, 62mm OD, and 12mm width. |
| CD | Specifies a 15° contact angle and indicates the bearing is supplied with a specific preload and internal design optimized for high rigidity. |
| P4A | Denotes a high-precision tolerance class equivalent to ABEC-7. This ensures extremely tight dimensional and running accuracy for applications requiring minimal vibration and high-speed operation. |
S71908 CD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The single-row design with a 15° contact angle and factory-applied preload provides high axial and radial stiffness, critical for maintaining accuracy under load. The P4 tolerance guarantees precise internal geometry and smooth operation.
Optimized for High-Speed Operation: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 22,000 rpm. This makes it a true high-speed bearing.
Superior Load Capacity: Manufactured from high-grade chrome steel for both rings and balls, the bearing achieves a high dynamic load rating of 2790 lbf and a static load rating of 1912 lbf, enabling reliable performance under significant combined loads.
Sealed and Lubricated for Life: As a sealed bearing, it is protected from contamination and is pre-lubricated with a high-performance grease suitable for its specified temperature range of -30°C to 110°C, offering long-term, maintenance-free service.
S71908 CD/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes requiring high precision and rigidity.
- Precision Instrumentation: Measuring devices, optical scanners, and laboratory equipment.
- High-Speed Motors and Drives: Servo motors, spindle drives, and other high-RPM electric motors.
- Robotics: Joints and actuators in industrial robots where accuracy and responsiveness are critical.
