71909 ACDGA/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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Product Overview and Core Advantages
The 71909 ACDGA/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 bearing delivers superior dimensional stability and running accuracy. Its 25° contact angle provides excellent capability to handle combined radial and axial loads simultaneously. The phenolic cage and precision-ground components make it ideal for high-speed operation up to 41,000 rpm, while the universal matching capability allows for flexible mounting arrangements in demanding applications.
71909 ACDGA/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 |
| DGA | Universal Matchable bearing (can be paired in various arrangements) |
| P4A | High precision tolerance class with enhanced running accuracy |
Structural Features and Performance Benefits
Precision Engineering: The bearing features extra light preload (Class A) and P4A tolerance class, ensuring minimal runout and vibration for smooth operation in precision machinery.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and reduced friction, enabling operation at limiting speeds of 41,000 rpm while maintaining dimensional stability.
Load Capacity: With a 25° contact angle, the bearing efficiently handles combined radial and axial loads, featuring a dynamic load rating of 2790 lbf and static load rating of 2025 lbf.
Universal Matching Design: The DGA suffix indicates universal matchability, allowing bearings to be paired in back-to-back, face-to-face, or tandem arrangements without selective assembly.
Material Quality: Manufactured from chrome steel for both rings and balls, providing high hardness, wear resistance, and long service life in demanding conditions.
71909 ACDGA/P4A Bearing Typical Application Areas
- Machine tool spindles requiring high precision and rigidity
- High-speed machining centers and CNC equipment
- Precision grinding spindles and dental equipment
- Industrial pumps and compressors operating at high speeds
- Robotics and automation systems demanding accurate positioning
- Aerospace components and instrumentation requiring reliable performance
- Semiconductor manufacturing equipment with stringent precision requirements
