71924 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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71924 ACDGA/P4A Bearing Product Overview & Core Advantages
The 71924 ACDGA/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Manufactured to P4A tolerance class, this single bearing offers superior running accuracy. Its defining feature is the 25° contact angle, which is optimized to support significant combined loads—handling both radial and axial forces simultaneously. The phenolic cage and universal matchable (SU) designation make it ideal for high-speed operation and precise preload configurations in machine tool spindles and other precision machinery.
Model Code In-Depth Analysis
| Code Segment | Technical Meaning |
|---|---|
| 71924 | Basic bearing series and size designation |
| AC | Angular Contact design |
| D | High ball complement and optimized internal geometry |
| GA | Universal Matchable bearing (SU designation) |
| P4A | High precision tolerance class, superior to ABEC 7 |
71924 ACDGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The 25° contact angle and optimized internal geometry enable the bearing to handle substantial combined radial and axial loads with high rigidity, making it suitable for applications with complex loading conditions.
High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 10,000 rpm. This makes it an excellent choice for high-speed spindle applications.
Precision & Universal Matching: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width. The Universal Matchable (SU) feature allows two bearings to be mounted in a preloaded arrangement (e.g., back-to-back or face-to-face) without selective assembly, simplifying installation and ensuring optimal performance.
Material & Lubrication: Constructed from chrome steel for both rings and balls, providing high durability and fatigue resistance. The bearing is pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
71924 ACDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers.
- High-Speed Machining Centers: Applications requiring high rotational accuracy and speed.
- Precision Instrumentation: Measuring devices and laboratory equipment.
- Robotics: High-accuracy robotic arm joints and spindle drives.
