71908 CD/P4ADFC
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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71908 CD/P4ADFC Bearing Product Overview & Core Advantages
The 71908 CD/P4ADFC is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched bearing set features a Face-to-Face (DF) arrangement and a P4A tolerance class, making it ideal for high-speed spindles and precision machinery. Its key advantage lies in its ability to handle combined loads (radial and axial) simultaneously while providing high rigidity and stable performance under demanding conditions.
71908 CD/P4ADFC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71908 | Basic bearing designation (40mm bore, 62mm OD, 24mm width) |
| C | 15° contact angle |
| D | Duplex bearing set |
| P4A | High precision tolerance class (exceeding ABEC 7) |
| DF | Face-to-Face arrangement for increased moment rigidity |
| C | Moderate preload (Class C) for optimal stiffness |
71908 CD/P4ADFC Bearing Structural Features & Performance Benefits
This bearing's performance stems from its sophisticated design: The duplex configuration in a Face-to-Face arrangement significantly enhances system rigidity and moment load capacity. The 15° contact angle provides excellent performance for combined radial and axial loads. The phenolic cage ensures smooth operation at high speeds, contributing to the impressive limiting speed of 56,000 rpm. Manufactured to P4A precision standards with tight dimensional tolerances, this bearing delivers exceptional running accuracy. The moderate preload eliminates internal clearance, providing immediate response and minimizing deflection under load.
71908 CD/P4ADFC Bearing Typical Application Areas
The 71908 CD/P4ADFC is specifically engineered for high-performance applications including: Machine tool spindles, High-speed machining centers, Precision grinding spindles, Industrial robotics, and Medical equipment where exceptional accuracy, rigidity, and speed capabilities are critical requirements.
