71904 CDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71904 CDGC/P4A Bearing Product Overview & Core Advantages
The 71904 CDGC/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to accommodate combined loads (radial and axial), this bearing features a 15° contact angle and P4A tolerance class for superior running accuracy. Its moderate preload (Class C) ensures optimal stiffness and minimal deflection under operational stresses, making it ideal for high-speed spindles and precision machinery where reliability is critical.
71904 CDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71904 | Basic bearing designation indicating metric dimensions (20mm bore, 37mm OD, 9mm width) |
| CD | Contact angle of 15° |
| G | Moderate preload (Class C) |
| C | Phenolic resin cage |
| P4A | High precision tolerance class (superior to ABEC 7) |
71904 CDGC/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring exceptional running accuracy and minimal vibration.
Optimized Load Capacity: The 15° contact angle provides excellent performance for combined radial and axial loads, with dynamic load rating of 1361 lbf and static load rating of 720 lbf.
High-Speed Capability: The phenolic cage and optimized internal geometry enable limiting speeds of 100,000 rpm, making it suitable for high-speed applications.
Universal Matching Design: Designed as Universal Matchable (SU), allowing precise bearing arrangement in sets of 2 for enhanced system rigidity and performance.
Premium Materials: Constructed from chrome steel rings and balls with 15 precision balls (4.762mm diameter) for durability and consistent performance.
71904 CDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision lathes
- Precision Instrumentation - Measuring equipment and optical devices
- High-Speed Motors - Spindle motors and servo drives
- Medical Equipment - Dental handpieces and surgical tools
- Aerospace Components - Guidance systems and precision actuators
