71914 ACD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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71914 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 71914 ACD/P4ADBC is a precision duplex pair of angular contact ball bearings designed for applications demanding exceptional rotational accuracy and rigidity. This back-to-back (DB) arrangement is preloaded to Moderate / Class C, providing superior stability and resistance to combined loads. Manufactured to the exacting P4A tolerance class, this bearing set is engineered for high-precision, high-speed spindles and other critical machinery where uncompromising performance is required.
71914 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71914 | Basic bearing series, indicating a high-precision, light series angular contact bearing. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a duplex pair of two bearings. |
| P4A | The tolerance class, denoting very high running accuracy for spindle applications. |
| DB | The matched arrangement: Back-to-Back. This configuration provides high moment rigidity. |
| C | Specifies the preload level: Moderate / Class C. |
71914 ACD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The back-to-back (DB) duplex arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, making it ideal for precision spindles.
Superior Load Capacity: The 25° contact angle and duplex design enable the bearing to handle significant combined radial and axial loads simultaneously.
Optimized High-Speed Performance: The lightweight phenolic cage ensures smooth operation and low friction at high speeds, contributing to the high limiting speed of 28,000 rpm. The bearings are pre-lubricated for immediate operation.
Precision Engineering: Adherence to the P4A tolerance class and tight dimensional tolerances on the bore diameter and outside diameter guarantee exceptional running accuracy and minimal vibration.
71914 ACD/P4ADBC Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Gearboxes
- Robotic Arm Joints and Precision Drives
- Aerospace and Defense Positioning Systems
