71913 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71913 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71913 ACDGB/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and exceptional running accuracy. Operating under a Light preload (Class B), it is designed to support primarily axial loads in one direction, combined with moderate radial loads. Its P4A tolerance class ensures superior dimensional and running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and vibration are critical. The bearing is Universal Matchable (SU), allowing for precise preload control when mounted in sets.
71913 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing series and size designation. |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Duplex arrangement back-to-back (DB) design with a Light preload (Class B). |
| P4A | High-Precision Tolerance Class, exceeding standard ABEC 7/ISO P4 specifications for enhanced running accuracy. |
71913 ACDGB/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of a lightweight phenolic resin cage and optimized internal geometry contributes to low rotational inertia and friction, enabling a high limiting speed of 36,000 rpm.
Superior Rigidity and Accuracy: Manufactured to P4A tolerance standards with a 25° contact angle, this bearing provides high system rigidity and precise rotational performance, essential for machine tool spindles.
Optimized Load Capacity: The design is optimized to handle significant axial loads in one direction, making it suitable for applications with demanding thrust requirements.
Universal Matching (SU): This feature allows bearings to be supplied in matched sets (typically 3 bearings) that are selectively assembled to achieve a specified preload when mounted together, simplifying installation and ensuring consistent performance.
71913 ACDGB/P4A Bearing Typical Application Areas
The 71913 ACDGB/P4A is ideally suited for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Drives
- High-Frequency Motors
- Aerospace Control Systems
