71917 CDGA/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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71917 CDGA/P4A Bearing Product Overview & Core Advantages
The 71917 CDGA/P4A is a single row angular contact ball bearing designed for ultra-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior running precision and dimensional stability. Its 15° contact angle and extra light preload (Class A) are optimized for high-speed operation while providing excellent resistance to combined radial and axial loads. The phenolic cage and universal matchable (SU) designation make it ideal for demanding, high-precision spindle arrangements.
71917 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| CDGA | 15° contact angle, Extra light preload (Class A), Universal Matchable | Optimized for high-speed performance and low operating torque; bearings can be universally paired for precise preload control. |
| P4A | ABEC 7 / ISO P4A Tolerance Class | Guarantees extremely tight dimensional and running accuracy for precision applications. |
71917 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: The P4A tolerance class ensures minimal runout and vibration, while the 15° contact angle provides optimal stiffness for combined loads, making it exceptionally stable under high-speed rotation.
- Superior High-Speed Capability: The phenolic resin cage offers low weight and excellent sliding properties, contributing to a high limiting speed of 17,000 rpm. The extra light preload minimizes friction and heat generation at ultra-high speeds.
- Universal Matching Design (SU): This bearing is universally matchable, allowing for flexible arrangement in sets (typically 2 or more bearings) to achieve the desired preload and system rigidity without selective matching.
- Optimized Material Selection: Constructed from high-grade chrome steel for rings and balls, ensuring high fatigue life and durability. The phenolic cage is suitable for the specified temperature range of -30°C to 110°C.
71917 CDGA/P4A Bearing Typical Application Areas
The 71917 CDGA/P4A is engineered for the most demanding high-precision and high-speed machinery, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and high-speed milling heads.
- Precision Instrumentation: High-speed measuring devices and laboratory equipment.
- High-Frequency Motors: Spindles for PCB drilling and semiconductor manufacturing equipment.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotational mechanisms.
