71900 CD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71900 CD/P4ADGB Bearing Product Overview & Core Advantages
The 71900 CD/P4ADGB is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed capability. As a universal matchable (SU) bearing supplied in a light preload (Class B) duplex set, it is engineered to handle combined radial and axial loads simultaneously. Its P4A tolerance class ensures ultra-precise running, making it ideal for high-rigidity, high-reliability spindles and precision machinery where minimal runout and thermal stability are critical.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71900 | Basic bearing series, indicating a super-precision, miniature angular contact design. |
| CD | Duplex arrangement with a 15° contact angle, configured for universal matching (any combination can be paired). |
| P4A | The tolerance class, denoting extremely tight dimensional and running accuracy exceeding ABEC 7/ISO P4. |
| DGB | Indicates the bearing is lubricated and supplied as a universal matchable (SU) duplex set. |
71900 CD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex (CD) design creates a preloaded unit that provides significantly increased system rigidity. This allows the bearing to effectively support combined loads (radial and axial) from both directions, enhancing the stability of the shaft assembly.
Superior High-Speed Performance: The combination of a lightweight phenolic resin cage, a 15° contact angle, and precision-ground chrome steel components minimizes centrifugal forces and friction, enabling a high limiting speed of 165,000 rpm. This makes it an excellent choice for high-speed spindles.
Precision & Reliability: Manufactured to P4A tolerance class, this bearing guarantees minimal running noise and vibration. The open seal type is optimized for controlled, clean environments where maximum speed is the priority, and is supplied pre-lubricated for immediate operation.
71900 CD/P4ADGB Bearing Typical Application Areas
The 71900 CD/P4ADGB is ideally suited for high-performance applications requiring compact size and supreme accuracy, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- Dental and Medical Handpiece Drives
- High-Frequency CNC Milling Spindles
- Robotic Arm Drives and Precision Gearboxes
