S71920 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71920 ACD/P4A Bearing Product Overview & Core Advantages
The S71920 ACD/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a single-row bearing, it is engineered to accommodate combined loads, primarily high axial loads in one direction, making it ideal for high-speed spindles and precision machinery. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, while the phenolic cage and pre-greased design contribute to reliable, high-speed operation. This bearing offers a compact and robust solution for machine tools and other high-performance equipment.
S71920 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1920 | Bore diameter code (100 mm) and series size. |
| AC | Contact angle of 25°, optimized for high axial load capacity. |
| D | Indicates a high rigid phenolic resin cage. |
| P4A | Specifies a P4 (ABEC-7) tolerance class with specific running accuracy requirements. |
S71920 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row design with a 25° contact angle and P4 tolerance provides high running accuracy and system stiffness, essential for minimizing deflection in precision spindles.
- Superior Load Capacity: Engineered to handle significant combined radial and axial loads, with a radial dynamic load rating of 12,870 lbf and a static load rating of 14,175 lbf.
- Optimized High-Speed Performance: The lightweight and robust phenolic cage (D), combined with a limiting speed of 8,000 rpm, ensures stable operation at high rotational speeds.
- Pre-Lubricated and Sealed: The bearing comes lubricated and sealed, protecting against contamination and providing long-term, maintenance-free service within its specified temperature range.
S71920 ACD/P4A Bearing Typical Application Areas
The S71920 ACD/P4A is ideally suited for high-performance applications requiring precision and speed, such as:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Instrumentation
