71809 ACDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71809 ACDGB/P4 Bearing Product Overview & Core Advantages
The 71809 ACDGB/P4 is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, this metric bearing delivers superior dimensional stability and running accuracy. Its key advantage lies in its ability to accommodate combined loads (radial and axial) simultaneously, making it ideal for applications demanding high rigidity and precise shaft positioning. The light preload (Class B) ensures minimal deflection under operational stresses, while the phenolic cage and optimized contact angle of 25° contribute to smooth, high-speed operation up to 46,000 rpm.
71809 ACDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71809 | Basic bearing designation indicating metric dimensions (45mm bore, 58mm OD, 7mm width) |
| AC | Angular Contact design with 25° contact angle |
| DGB | Universal Matchable (SU) bearing for paired arrangements |
| P4 | High-precision tolerance class for exceptional running accuracy |
71809 ACDGB/P4 Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The single-row angular contact design with P4 tolerance class ensures exceptional dimensional accuracy and stiffness, providing stable performance under combined radial and axial loads.
Optimized Load Capacity: With a 25° contact angle and 31 chrome steel balls of 3.175mm diameter, the bearing achieves optimal load distribution, supporting radial dynamic load rating of 1040 lbf and radial static load rating of 1125 lbf.
High-Speed Performance: The phenolic cage material reduces friction and enables limiting speeds of 46,000 rpm, while the open design facilitates efficient lubrication management.
Universal Matching Capability: Designed as Universal Matchable (SU) bearings, they can be supplied in matched sets of 3 for precise preload arrangements in complex bearing configurations.
71809 ACDGB/P4 Bearing Typical Application Areas
The 71809 ACDGB/P4 is specifically engineered for demanding applications including:
- Machine tool spindles requiring high precision and rigidity
- High-speed machining centers and precision grinding machines
- Industrial pumps and compressors operating at elevated speeds
- Precision instruments and measuring equipment
- Robotics and automation systems demanding accurate positioning
- Aerospace components requiring reliable high-speed operation
