71922 FEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71922 FEGA/P4A Bearing Product Overview & Core Advantages
The 71922 FEGA/P4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional rotational accuracy. Manufactured to the stringent P4A tolerance class, this bearing is designed to handle primarily axial loads in one direction, as well as combined radial and axial loads. Its extra light preload (Class A) minimizes deflection under light loads, ensuring smooth, precise operation. The bearing features a phenolic cage, which contributes to its high-speed capability and is pre-lubricated for immediate use. It is also Universal Matchable (SU), allowing for precise axial play adjustment when mounted in sets, making it ideal for high-rigidity, high-speed spindles.
71922 FEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71922 | Basic bearing series and size designation. | Indicates a high-precision, light series angular contact bearing with a 110mm bore and 150mm OD. |
| FE | Optimized internal geometry for improved performance. | Enhances load capacity and stiffness. |
| GA | Preload designation: Extra Light (Class A). | Ensures minimal runout and high positional accuracy, suitable for high-speed applications. |
| P4A | Tolerance class. | Denotes super-precision dimensional and running accuracy, superior to ABEC 7/ISO P4. |
71922 FEGA/P4A Bearing Structural Features & Performance Benefits
High Precision and Rigidity: The P4A tolerance class and extra light preload provide exceptional running accuracy and system rigidity, critical for applications requiring minimal deflection.
Optimized Load Capacity: With an 18° contact angle, this bearing is engineered to efficiently support high axial loads in one direction and combined loads, as reflected in its dynamic (8932 lbf) and static (7650 lbf) load ratings.
Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling stable operation at high rotational speeds (limiting speed of 16,250 rpm).
Universal Matching Capability (SU): This bearing can be universally matched with other bearings of the same designation in any combination, allowing for precise control of preload and axial clearance in multi-bearing arrangements, typically in sets of 2, 3, or 4 bearings.
71922 FEGA/P4A Bearing Typical Application Areas
The 71922 FEGA/P4A is ideally suited for high-performance machinery where precision and speed are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric motors requiring minimal vibration.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and other precision instruments.
