71922 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71922 CDGA/P4A Bearing Product Overview & Core Advantages
The 71922 CDGA/P4A is a single row angular contact ball bearing engineered for applications demanding ultra-high precision and superior running accuracy. Operating under the stringent P4A tolerance class, this bearing is designed to handle significant combined loads—primarily thrust loads in one direction, complemented by moderate radial loads. Its 15° contact angle and extra light preload (Class A) make it exceptionally suitable for high-speed spindles and precision machinery where minimal deflection and low operating torque are critical. The bearing is universally matchable (SU), allowing for flexible mounting configurations in sets to achieve optimal stiffness and performance.
71922 CDGA/P4A 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 and 150 mm OD. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and thrust load capacity. |
| DG | Indicates the bearing is universally matchable (SU). Two such bearings can be paired in a "back-to-back" (DB) or "face-to-face" (DF) arrangement with a predetermined gap. |
| A | Denotes an extra light preload (Class A), which minimizes friction and heat generation for superior high-speed performance. |
| P4A | The tolerance class, signifying extremely tight dimensional and running accuracy tolerances that exceed ABEC 7/ISO P4 standards. |
71922 CDGA/P4A Bearing Structural Features & Performance Benefits
- High-Precision Design: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional running accuracy and system rigidity.
- Optimized Load Capacity: The 15° contact angle and robust construction provide a high dynamic load rating of 14,040 lbf and static load rating of 16,200 lbf, enabling reliable performance under demanding combined loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage and optimized internal geometry contribute to a high limiting speed of 16,250 rpm, reducing centrifugal forces and maintaining stability.
- Premium Material Construction: Rings and balls made from high-grade chrome steel offer excellent wear resistance and durability, while the phenolic cage ensures smooth operation at high speeds.
- Pre-Lubricated & Universal Matching: The bearing comes lubricated for immediate use and is universally matchable (SU), allowing for simplified installation and precise axial preload control in multi-bearing arrangements.
71922 CDGA/P4A Bearing Typical Application Areas
The 71922 CDGA/P4A 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 Robotics: Arm joints and spindle drives requiring high accuracy and rigidity.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units (APUs).
- High-Frequency Motors and Spindles: Where low vibration and minimal runout are critical.
