71920 ACD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71920 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 71920 ACD/P4ADGB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This universal matchable (SU) bearing features a P4A tolerance class and light preload (Class B), making it ideal for high-speed spindles and precision machinery. Its 25° contact angle enables superior performance in handling combined radial and axial loads simultaneously, while the phenolic cage ensures optimal operation at elevated speeds.
71920 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 71920 | Standard bearing size designation (100mm bore × 140mm OD × 40mm width) | Standardized dimensions for easy integration |
| ACD | 25° contact angle design | Optimized for combined load capacity |
| P4A | High precision tolerance class | Exceptional running accuracy and minimal vibration |
| DGB | Universal matchable pairing designation | Flexible mounting arrangements in pairs |
71920 ACD/P4ADGB Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional stability and running accuracy.
Optimized Load Capacity: The 25° contact angle and 26 chrome steel balls (12.7mm diameter) provide excellent combined load capacity with dynamic rating of 20,768 lbf and static rating of 28,125 lbf.
High-Speed Performance: Phenolic resin cage enables smooth operation at limiting speeds up to 15,000 rpm, reducing friction and heat generation.
Universal Matching Capability: As an SU universal matchable bearing, it can be paired in various configurations (back-to-back, face-to-face, or tandem) to meet specific application requirements.
Precision Preload: Light preload (Class B) minimizes deflection while maintaining optimal stiffness for precision applications.
71920 ACD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles
- Precision Instrumentation: Measuring equipment and optical systems
- High-Speed Automation: Robotics and CNC machinery
- Aerospace Components: Guidance systems and aircraft instrumentation
- Medical Equipment: Dental handpieces and surgical tools
