71910 CD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71910 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71910 CD/P4ADBA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a duplex back-to-back (DB) matched set, it is pre-configured to provide superior stability under combined loads, including radial and axial loads in both directions. Manufactured to the exacting P4A tolerance class, this bearing offers extremely tight dimensional and running accuracy. Its extra light preload (Class A) minimizes deflection and ensures smooth, high-speed operation, making it an ideal choice for high-precision spindles and other critical machinery components.
71910 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing series and size designation. |
| C | 15° contact angle, optimized for high-speed performance and moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex pair. |
| P4A | High-precision tolerance class, specifying extremely tight limits on bore, outside diameter, and width deviations, as well as running accuracy. |
| DB | Duplex Back-to-Back arrangement. The two bearings are mounted with their faces opposed, increasing moment rigidity and providing excellent resistance to overturning moments. |
| A | Specifies the extra light preload (Class A) applied to the matched set, which minimizes friction and heat generation at high speeds. |
71910 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that significantly increases resistance to moment loads and shaft deflection, ensuring precise shaft positioning.
Superior Load Capacity: The angular contact design with a 15° contact angle enables the bearing to efficiently handle combined radial and axial loads from both directions simultaneously.
Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the extra light preload and precision grinding contribute to a high limiting speed of 46,000 rpm, making it suitable for demanding high-speed applications.
Precision and Accuracy: Conformance to the P4A tolerance class guarantees minimal runout and vibration, which is critical for achieving high surface finish quality and machining accuracy.
71910 CD/P4ADBA Bearing Typical Application Areas
The 71910 CD/P4ADBA is engineered for high-performance machinery where precision and speed are paramount. Key applications include:
- Machine Tool Spindles for CNC machining centers, grinders, and lathes.
- High-frequency Precision Spindles in PCB drilling and routing.
- High-speed Robotic Drives and precision gearboxes.
- Axles and mandrels in other precision industrial equipment requiring high rigidity.
