S71930 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71930 ACD/P4A Bearing Product Overview & Core Advantages
The S71930 ACD/P4A is a precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. This single-row bearing features a 25° contact angle and is supplied with a P4 (ABEC-7) tolerance class, making it ideal for high-speed spindles and precision machinery. Its key advantage lies in its ability to accommodate combined radial and axial loads simultaneously, providing stable and reliable performance in demanding operational conditions. The combination of a phenolic cage and pre-lubrication ensures smooth operation at high speeds, while the sealed design offers protection against contamination.
S71930 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1930 | Standardized size code (Bore: 150mm, OD: 210mm, Width: 28mm). |
| ACD | Contact angle of 25° and optimized internal design for high rigidity. |
| P4A | Indicates a P4 tolerance class (equivalent to ABEC-7) for superior running accuracy. |
S71930 ACD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The 25° contact angle and robust internal geometry enable the bearing to support significant combined loads. With a dynamic load rating of 24,300 lbf and a static load rating of 28,125 lbf, it delivers reliable performance under strenuous conditions.
High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, contributing to a high limiting speed of 5,600 rpm. This makes the bearing suitable for high-speed applications such as machine tool spindles.
Sealed and Lubricated Design: The integrated seals protect against contaminants, while the factory-applied lubrication ensures immediate readiness and long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
Precision Engineering: Manufactured to P4 tolerance standards with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing guarantees minimal runout and vibration for superior application performance.
S71930 ACD/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers.
- High-Speed Motors and Spindles: Applications requiring low vibration and high rotational accuracy.
- Precision Instrumentation: Measuring devices and laboratory equipment.
- Robotics and Automation: High-accuracy rotary joints and arm assemblies.
