71909 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71909 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71909 ACDGB/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this metric bearing delivers superior dimensional stability and running accuracy. Its 25° contact angle and light preload (Class B) configuration enable optimal performance in applications demanding high-speed operation and precise axial positioning. The phenolic cage and universal matching capability make it ideal for matched bearing arrangements in spindle systems.
71909 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71909 | Basic bearing series with 45mm bore diameter |
| AC | Angular Contact design with 25° contact angle |
| DGB | Universal Matchable bearing for preloaded arrangements |
| P4A | High precision tolerance class with enhanced running accuracy |
71909 ACDGB/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: The P4A tolerance class ensures minimal dimensional variation, providing consistent performance in precision applications. The phenolic cage offers excellent dimensional stability and reduced friction at high speeds.
Optimized Load Capacity: With a 25° contact angle, this bearing effectively handles combined radial and axial loads. The radial dynamic load rating of 2790 lbf and static load rating of 2025 lbf ensure reliable operation under demanding conditions.
High-Speed Performance: The phenolic cage and optimized internal geometry enable a limiting speed of 41,000 rpm, making it suitable for high-speed spindle applications.
Universal Matching Capability: Designed as Universal Matchable (SU), these bearings can be supplied in matched sets of 3 for precise preload control in duplex arrangements.
71909 ACDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- High-Speed Spindles - CNC machining centers and precision grinding equipment
- Precision Instruments - Measuring equipment and optical instruments
- Robotic Systems - High-accuracy robotic arms and positioning systems
- Medical Equipment - Dental handpieces and surgical tool spindles
