71915 CB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71915 CB/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 (ABEC-7) tolerance class, this bearing delivers superior running precision. Its key advantage lies in its ability to accommodate combined loads—significant radial loads and substantial thrust loads in one direction—thanks to its specific 15° contact angle. The phenolic resin cage and preloaded configuration ensure stable operation at high speeds, making it an ideal choice for machine tool spindles and other high-speed, high-rigidity applications.
71915 CB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71915 | Basic bearing designation indicating a light series, single-row angular contact ball bearing with a 75mm bore. |
| CB | Specifies a specific contact angle (15°) and internal design optimized for universal matching when mounted in pairs. |
| P4A | Denotes a high-precision tolerance class (P4/ABEC-7) with specific running accuracy requirements. |
Structural Features and Performance Benefits
- High Rigidity and Precision: The single-row design with a 15° contact angle provides excellent rigidity and running accuracy, essential for applications demanding minimal deflection. Manufactured to P4 tolerance class, it ensures precise dimensional control.
- Superior Load Capacity: Engineered to handle combined radial and axial loads efficiently. The dynamic load rating of 3150 lbf and static load rating of 2970 lbf demonstrate its robust performance.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 26,000 rpm. This makes it suitable for high-speed spindle applications.
- Preload and Stability: The bearing is supplied with preload, which increases system stiffness, reduces vibration, and improves rotational accuracy under operational loads.
71915 CB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring high precision and rigidity.
- Precision Instrumentation: High-accuracy measuring devices and scientific equipment.
- High-Speed Motors and Pumps: Applications demanding smooth operation at elevated rotational speeds.
- Robotics and Automation: Precision joints and axes where accuracy and reliability are critical.
