71906 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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71906 CB/P4A Bearing Product Overview & Core Advantages
The 71906 CB/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and superior running accuracy. Engineered to a P4 (ABEC-7) tolerance class, this bearing is optimized to handle significant axial loads in one direction while simultaneously supporting radial loads. Its 15° contact angle provides an excellent balance between axial load capacity and high-speed capability. The phenolic cage and preload availability contribute to its high rigidity and stable rotational performance, making it a critical component for high-reliability, precision machinery.
71906 CB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Bearing series and size designation (30mm bore, 47mm OD, 9mm width) |
| CB | Specific internal design with a 15° contact angle and modified internal clearances for optimized performance |
| P4A | Indicates P4 (ABEC-7) tolerance class with specific dimensional and running accuracy requirements for high-precision applications |
71906 CB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single-row angular contact design with a 15° contact angle and availability of preload enables high system rigidity and precise shaft positioning, essential for applications requiring minimal deflection.
- Optimized Load Capacity: Engineered to handle combined loads effectively, with superior axial load capacity in one direction. The radial dynamic load rating of 1098 lbf and static load rating of 709 lbf ensure reliable performance under demanding conditions.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a limiting speed of 60,000 rpm. This makes the bearing suitable for high-speed applications.
- Superior Material Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability, wear resistance, and consistent performance within a temperature range of -30°C to 110°C.
71906 CB/P4A Bearing Typical Application Areas
The 71906 CB/P4A is ideally suited for precision equipment and high-speed machinery, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Dental and Medical Handpieces
- Aerospace Control Systems
- High-Speed Robotic Drives
