S71930 CD/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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S71930 CD/P4A Bearing Product Overview & Core Advantages
The S71930 CD/P4A is a single-row angular contact ball bearing engineered for high-precision and high-speed applications. Positioned in the P4 (ABEC-7) tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its key advantage lies in its ability to accommodate significant combined loads—handling both radial loads and substantial axial loads in one direction simultaneously. The combination of a phenolic cage, factory-applied lubrication, and sealed design ensures reliable, long-lasting performance in demanding operational environments.
S71930 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| C | 15° Contact Angle | Optimized for high-speed operation with excellent axial load capacity. |
| D | Enhanced internal design | Increased load rating and optimized internal geometry. |
| P4A | P4 (ABEC-7) Tolerance Class | Guarantees ultra-precise running accuracy and dimensional stability for critical applications. |
| (Sealed) | Integrated Seals | Protects against contamination and retains lubricant, enhancing service life. |
S71930 CD/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The phenolic resin cage offers low mass and excellent sliding properties, contributing to a high limiting speed of 6,300 rpm. The 15° contact angle is specifically chosen to minimize heat generation at high rotational speeds.
- Superior Rigidity and Load Capacity: Manufactured from high-grade chrome steel for both rings and balls, this bearing achieves a high dynamic load rating of 25,650 lbf and a static load rating of 29,700 lbf. This ensures stable performance under significant combined radial and axial loads.
- Precision and Reliability: The P4 tolerance class ensures minimal runout and vibration, which is critical for the accuracy of the overall system. The preload availability allows for precise adjustment of bearing internal clearance to maximize system stiffness.
- Maintenance-Friendly Operation: Being pre-lubricated and sealed, the bearing is protected from contaminants and is effectively maintenance-free for its entire service life within the specified temperature range of -30°C to 110°C.
S71930 CD/P4A Bearing Typical Application Areas
The S71930 CD/P4A is ideally suited for high-performance machinery requiring precision and speed, including:
- Machine Tool Spindles (e.g., for milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Gearboxes and Robotic Drives
- Medical and Dental Equipment spindles
- Aerospace Actuation Systems and auxiliary units
