71909 CEGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71909 CEGB/P4A Bearing Product Overview & Core Advantages
The 71909 CEGB/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and exceptional running accuracy. Operating under a Light preload (Class B), this bearing is designed to support primarily axial loads in one direction, as well as combined radial and axial loads. Its P4A tolerance class ensures superior dimensional and running accuracy, making it ideal for high-speed spindles and precision machinery. The bearing is universally matchable (SU), allowing for precise axial rigidity control when mounted in pairs. With a 15° contact angle and a phenolic resin cage, it offers an optimal balance of high-speed capability, rigidity, and thermal stability.
71909 CEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71909 | Basic bearing series and size designation (45mm bore, 68mm OD, 12mm width) |
| C | 15° nominal contact angle |
| E | Optimized internal design for enhanced performance |
| GB | Light preload (Class B) |
| P4A | High precision tolerance class (superior to ABEC 7) |
71909 CEGB/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4A tolerance class with a light preload, this bearing delivers exceptional rotational accuracy and minimizes axial and radial runout, providing superior system rigidity and positioning precision.
High-Speed Performance: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction at high rotational speeds, contributing to the high limiting speed of 41,000 rpm.
Optimized Load Capacity: With a 15° contact angle, the bearing is engineered to handle significant axial loads in one direction and combined loads efficiently. The dynamic and static load ratings of 2340 lbf and 1530 lbf respectively, ensure reliable performance under demanding conditions.
Universal Matching Capability (SU): As a universally matchable bearing, it can be paired with another identical bearing in various configurations (back-to-back, face-to-face, or tandem) to achieve the required preload and stiffness for complex applications.
71909 CEGB/P4A Bearing Typical Application Areas
The 71909 CEGB/P4A is ideally suited for high-precision, high-speed applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
