S71928 ACDGA/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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S71928 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71928 ACDGA/P4A is a high-precision double row angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. This P4A tolerance class bearing is designed to accommodate combined loads (radial and bidirectional axial loads) simultaneously, offering a compact and robust solution. Its extra light preload (Class A) ensures minimal friction and precise rotational accuracy, making it ideal for high-speed operations up to 11,000 rpm. The sealed design with phenolic cage and grease lubrication provides long-term, maintenance-free performance.
S71928 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | High-precision bearing series |
| 1928 | Bore: 140 mm, Outside: 190 mm, Width: 24 mm |
| AC | Angular Contact design with 25° contact angle |
| D | Double row configuration |
| GA | Universal Matchable (SU) bearing in set of 3 |
| P4A | Ultra-precision tolerance class |
S71928 ACDGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row angular contact design provides superior rigidity and can handle significant combined radial and axial loads in both directions, with a dynamic load rating of 20,340 lbf and static load rating of 24,750 lbf.
High-Speed Performance: The phenolic cage and optimized grease lubrication enable stable operation at limiting speeds of 11,000 rpm, reducing friction and heat generation.
Precision & Stability: Manufactured to P4A tolerance standards with tight dimensional controls (bore/outside diameter tolerance: -0.004mm to 0), ensuring exceptional running accuracy and minimal vibration.
Maintenance-Free Operation: The sealed construction and pre-lubrication protect against contamination, offering reliable performance across a temperature range of -30°C to 110°C without requiring re-lubrication.
S71928 ACDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles
- High-Speed Industrial Pumps
- Precision Grinding Machines
- Medical Equipment Spindles
- Aerospace Control Systems
- Robotic Arm Joints
