S71904 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71904 CDGA/P4A Bearing Product Overview & Core Advantages
The S71904 CDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a universally matchable (SU) bearing supplied in sets of four, it enables optimized preload configurations for maximum system rigidity. Its compact 20 mm bore design delivers high load capacity in minimal space, while the P4A tolerance class ensures superior running accuracy. The phenolic cage and grease lubrication enable reliable operation at limiting speeds up to 75,000 rpm, making it ideal for high-precision spindles and other demanding applications.
S71904 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| S7 | Super-precision bearing series | Exceptional running accuracy and consistency |
| 1904 | Size designation (20×37×9 mm) | Compact dimensions with optimized internal geometry |
| CD | 15° contact angle, universal matching | Enables flexible bearing arrangements and preload optimization |
| GA | Light preload class | Reduced friction and heat generation at high speeds |
| P4A | Enhanced precision tolerance class | Superior dimensional and running accuracy for critical applications |
Structural Features & Performance Advantages
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and smooth operation at extreme rotational speeds up to 75,000 rpm. Combined with optimized grease lubrication, this ensures stable performance in high-speed applications.
Precision Engineering: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, this bearing delivers exceptional running accuracy and minimal vibration for precision machinery.
Optimized Internal Geometry: Featuring 15 precision-ground chrome steel balls (Ø4.762 mm) arranged in a 15° contact angle configuration, the bearing efficiently handles combined radial and axial loads while maintaining high rigidity.
Universal Matching Design: As part of a universally matchable set of four bearings, the S71904 CDGA/P4A enables precise preload control when mounted in pairs, ensuring optimal system stiffness and performance.
S71904 CDGA/P4A Bearing Typical Application Areas
- High-speed machine tool spindles for milling, grinding, and drilling operations
- Precision medical equipment including dental handpieces and surgical tools
- Industrial robotics and automation systems requiring high accuracy
- Aerospace components such as gyroscopes and navigation systems
- Semiconductor manufacturing equipment including wafer handling systems
- High-frequency motor spindles for PCB drilling and precision machining
