S71902 ACDGC/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71902 ACDGC/P4A Bearing Product Overview & Core Advantages
The S71902 ACDGC/P4A is a super-precision double row angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. This sealed bearing is designed to accommodate combined loads—simultaneous radial and bidirectional axial loads—with high reliability. Its compact cross-section, defined by a 15 mm bore and 28 mm outside diameter, makes it ideal for space-constrained, high-performance assemblies. Manufactured to the stringent P4A tolerance class, it delivers superior running accuracy and is preloaded for high rigidity and precise shaft positioning, making it a cornerstone for advanced mechanical systems.
S71902 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| DGC | Double Row, Universal Matchable (SU) bearing set. This bearing is one of a matched set of 3 for preload control. |
| P4A | Super Precision tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring extremely tight dimensional and running accuracy. |
S71902 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Stability: The double row design and Moderate (Class C) preload provide a stiff bearing arrangement that minimizes deflection under load, ensuring precise shaft guidance and excellent system stability.
- Superior Load Capacity: Engineered to handle combined loads effectively. The 25° contact angle optimizes its capacity for thrust loads in both directions, while the robust construction supports a high radial dynamic load rating of 848 lbf.
- High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, and the optimized internal geometry allows for a high limiting speed of 95,000 rpm, making it a true high-speed bearing.
- Maintenance-Free Operation: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is lubricated for life within its specified temperature range of -30°C to 110°C, reducing maintenance requirements.
S71902 ACDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles (e.g., for grinding, milling, and drilling)
- High-Frequency Spindles
- Precision Robotics and Automation Arms
- Medical Equipment (e.g., dental handpieces, surgical drills)
- High-Performance Pumps and Compressors
