71907 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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71907 CB/P4A Bearing Product Overview & Core Advantages
The 71907 CB/P4A is a single-row angular contact ball bearing designed for applications requiring high precision and superior running accuracy. Manufactured to P4 (ABEC-7) tolerance class, it delivers exceptional rotational precision and low noise levels. Its key advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction—making it an ideal choice for high-speed spindles and precision machinery where high rigidity and positional accuracy are critical. The bearing is preloaded and comes pre-lubricated for immediate installation and optimal performance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series and size designation (35mm bore, 55mm OD, 10mm width). |
| CB | Specific internal design and contact angle of 15°, optimized for combined loads. |
| P4A | Indicates a P4 (ABEC-7) tolerance class with specific dimensional and running accuracy requirements. |
71907 CB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: The single-row angular contact design with a 15° contact angle provides high rigidity and precise axial guidance, essential for minimizing deflection under load.
- Superior Load Capacity: Engineered to support combined radial and axial loads efficiently. The dynamic load rating of 1141 lbf and static load rating of 821 lbf ensure reliable performance in demanding applications.
- High-Speed Capability: The lightweight phenolic resin cage and optimized internal geometry contribute to a high limiting speed of 53,000 rpm, reducing centrifugal forces and operational temperatures.
- Preloaded & Ready-to-Use: Supplied as a preloaded and lubricated unit, ensuring immediate operational readiness, simplified installation, and consistent performance from startup.
- Premium Materials: Constructed from chrome steel for rings and balls, offering high wear resistance and durability under the specified temperature range of -30° to 110°C.
71907 CB/P4A Bearing Typical Application Areas
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- High-Frequency Motors
- Medical and Dental Equipment
- Aerospace Instrumentation
