71902 ACE/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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71902 ACE/P4ADBB Bearing Product Overview & Core Advantages
The 71902 ACE/P4ADBB is a precision angular contact ball bearing configured as a duplex back-to-back (DB) matched set. This configuration is engineered to provide exceptional rigidity and stability, making it ideally suited for applications requiring high running accuracy. The bearing is designed to accommodate combined loads, efficiently handling significant radial loads and axial loads in both directions simultaneously. Manufactured to a P4A tolerance class and featuring a light preload (Class B), it delivers superior performance in high-speed, high-precision scenarios.
71902 ACE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | The basic bearing designation, indicating a metric, angular contact bearing series with a 15mm bore. |
| ACE | Signifies a 25° contact angle, optimized for supporting high axial loads. |
| P4A | Denotes the high-precision tolerance class, ensuring minimal dimensional runout for superior rotational accuracy. |
| DB | Indicates the bearings are supplied as a Duplex Back-to-Back matched set, providing high moment rigidity. |
71902 ACE/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, which is critical for maintaining precision.
Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 1112 lbf, this bearing set is engineered to handle demanding combined radial and axial loads.
High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower friction and enabling stable operation at high rotational speeds, with a limiting speed of 95,000 rpm.
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional control on the bore, outside diameter, and width, this bearing ensures minimal vibration and high running accuracy.
71902 ACE/P4ADBB Bearing Typical Application Areas
The 71902 ACE/P4ADBB is designed for high-performance applications where precision and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles
- High-Frequency Spindles
- Precision Grinding Machines
- Robotic Arms and Drives
- High-Speed Pumps and Compressors
