71922 CD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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71922 CD/P4ADBB Bearing Product Overview & Core Advantages
The 71922 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) matched pair is preloaded to Light / Class B specifications, ensuring optimal performance under combined radial and axial loads. Manufactured to a P4A tolerance class, it delivers superior running accuracy, making it ideal for high-speed spindles and other high-precision machinery. Its compact design and robust construction provide reliable operation in demanding conditions.
71922 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71922 | Basic bearing designation, indicating a high-precision angular contact bearing series with a 110 mm bore, 150 mm OD, and 40 mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex (matched) pair. |
| P4A | Denotes an ultra-precision tolerance class (superior to ABEC 7), ensuring minimal runout and vibration for critical applications. |
| DB | Specifies the back-to-back mounting arrangement, which provides high moment rigidity and stability under complex loads. |
| B | Indicates the Light preload level, which minimizes deflection and ensures precise shaft positioning without excessive friction. |
71922 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The back-to-back (DB) duplex arrangement creates a wide, stable support system that significantly increases moment load capacity and resistance to tilting moments, which is critical for machine tool spindles.
Superior Load Capacity: With a dynamic load rating of 22,725 lbf and a static load rating of 32,175 lbf, this bearing is engineered to handle significant combined radial and axial loads simultaneously.
Optimized High-Speed Performance: The 15° contact angle and phenolic resin cage reduce centrifugal forces and friction, enabling a high limiting speed of 10,000 rpm. The cage is lightweight and possesses excellent sliding properties, contributing to smooth operation at high rotational speeds.
Precision Engineering: Manufactured from chrome steel for both rings and balls, and held to P4A dimensional tolerances, this bearing guarantees exceptional running accuracy, low noise, and minimal heat generation.
71922 CD/P4ADBB Bearing Typical Application Areas
The 71922 CD/P4ADBB 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, and turning centers.
- Precision Gearboxes: Applications requiring minimal backlash and high positional accuracy.
- High-Frequency Motors and Spindles: Where low vibration and thermal stability are critical.
- Medical and Laboratory Equipment: Centrifuges and other precision rotary devices.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other high-reliability mechanisms.
