71904 CEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71904 CEGA/P4A Bearing Product Overview & Core Advantages
The 71904 CEGA/P4A is a single-row angular contact ball bearing designed for applications requiring high precision and exceptional rotational accuracy. Engineered to accommodate combined loads (radial and axial loads in one direction), this bearing features P4A tolerance class for superior dimensional and running accuracy. Its extra light preload (Class A) ensures minimal deflection under operational stresses, making it ideal for high-speed spindles and precision machinery where rigidity and minimal runout are critical. The bearing comes pre-lubricated and is universally matchable (SU designation), allowing for flexible mounting configurations in pairs to handle bidirectional axial loads.
71904 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71904 | Basic bearing series, indicating a light series angular contact ball bearing with 20mm bore, 37mm OD, and 9mm width. |
| C | 15° contact angle, optimized for high-speed applications and axial load capacity. |
| E | Optimized internal design for enhanced load rating and performance. |
| GA | Indicates light preload (Class A) for reduced deflection and improved rigidity. |
| P4A | High precision tolerance class, ensuring tight dimensional and running accuracy for critical applications. |
71904 CEGA/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: The P4A tolerance class and extra light preload deliver exceptional running accuracy and stiffness, minimizing deflection under load. This is critical for maintaining precision in high-speed operations.
Optimized Load Capacity: With a 15° contact angle and optimized internal geometry (denoted by suffix E), the bearing efficiently handles combined radial and axial loads. The dynamic load rating of 1112 lbf and static load rating of 531 lbf ensure reliable performance under demanding conditions.
High-Speed Capability: The phenolic cage reduces centrifugal forces and friction, supporting a limiting speed of 100,000 rpm. The open design and pre-lubrication facilitate effective heat dissipation and smooth operation at high rotational speeds.
Universal Matching & Versatility: As a universally matchable (SU) bearing, it can be paired in duplex sets (back-to-back or face-to-face) to accommodate bidirectional axial loads and moments, enhancing application flexibility.
71904 CEGA/P4A Bearing Typical Application Areas
The 71904 CEGA/P4A is ideally suited for high-precision, high-speed applications across various industries:
- Machine Tool Spindles: Provides high rigidity and accuracy for CNC machining centers, grinding spindles, and milling machines.
- Precision Instrumentation: Used in measuring devices, optical instruments, and laboratory equipment requiring minimal runout.
- High-Speed Motors & Drives: Supports efficient operation in servo motors, spindle drives, and robotics.
- Aerospace & Defense Systems: Employed in gyroscopes, navigation systems, and other critical components demanding reliability and precision.
