S71919 ACD/P4ADGC
Sealed Super Precision Angular Contact Ball Bearings
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S71919 ACD/P4ADGC Bearing Product Overview & Core Advantages
The S71919 ACD/P4ADGC is a precision double row angular contact ball bearing engineered for applications demanding exceptional accuracy and rigidity. Positioned in the P4A super-precision tolerance class, it is designed to simultaneously handle significant combined radial and axial loads from both directions. Its compact double-row design offers a high degree of stiffness in a single bearing unit, making it ideal for high-speed spindles and other high-reliability machinery where rotational accuracy is paramount. The bearing comes pre-lubricated with grease and is sealed for life, ensuring long-term performance with minimal maintenance.
S71919 ACD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | 25° contact angle, Double row design | Optimized for carrying combined loads and providing high rigidity. |
| P4A | Super precision tolerance class (equivalent to ABEC 7) | Guarantees extremely tight running accuracy for high-precision applications. |
| DGC | Universal Matchable (SU) bearing set | Allows for flexible mounting arrangements (back-to-back, face-to-face, tandem) to optimize preload and stiffness. |
S71919 ACD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design, combined with a 25° contact angle, provides superior stiffness and enables the bearing to support substantial radial dynamic load ratings of 17,122 lbf and static load ratings of 23,400 lbf, as well as bidirectional axial loads.
- High-Speed Performance: The lightweight and robust phenolic cage minimizes centrifugal forces and friction, contributing to a high limiting speed of 21,000 rpm. This makes it a true high-speed bearing.
- Precision & Stability: Manufactured to P4A tolerance class with a bore and outside diameter tolerance of -0.004mm to 0, this precision bearing ensures minimal runout and consistent performance under demanding conditions.
- Maintenance-Free Operation: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is designed for long service life without re-lubrication within its specified temperature range of -30°C to 110°C.
S71919 ACD/P4ADGC Bearing Typical Application Areas
The S71919 ACD/P4ADGC is ideally suited for high-performance machinery requiring precision, speed, and rigidity. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring and testing equipment.
- High-Frequency Motors & Spindles: Where low vibration and high rotational accuracy are critical.
- Industrial Pumps and Compressors: For handling combined loads in demanding fluid power applications.
