71902 ACD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71902 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 71902 ACD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a universal matchable (SU) bearing, it can be paired with another identical bearing in a back-to-back, face-to-face, or tandem arrangement to achieve specific preload and rigidity requirements. Its P4A tolerance class ensures superior dimensional and running accuracy, making it ideal for high-precision spindles and machinery. The combination of a light preload (Class B) and a 25° contact angle provides excellent operational stability and the capacity to handle combined loads efficiently.
71902 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing series and size designation. |
| AC | Angular Contact design. |
| D | High Contact Angle (25° in this specification). |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| DB | Universal Matchable (SU) designation, indicating the bearing is supplied as one of a pair for universal mounting. |
71902 ACD/P4ADGB Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage is lightweight and ensures stable operation at the high limiting speed of 95,000 rpm, reducing centrifugal forces and friction.
Superior Rigidity and Load Capacity: The angular contact design with a 25° contact angle provides high rigidity and is optimized to support significant combined radial and axial loads.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing guarantees minimal runout and vibration for ultra-precise applications.
Universal Matchability (SU): This feature allows for flexible mounting configurations (back-to-back, face-to-face) using two bearings to create a preloaded set, simplifying assembly and enhancing system stiffness.
71902 ACD/P4ADGB Bearing Typical Application Areas
- High-Frequency Spindles for CNC machining centers and PCB drilling machines
- Precision grinding spindles
- High-speed machine tool applications
- Advanced medical and dental equipment spindles
- High-performance robotic drives and servo motors
