S71920 ACE/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 ACE/P4A Bearing Product Overview & Core Advantages
The S71920 ACE/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 high combined loads, primarily thrust loads in one direction, with a 25° contact angle. Manufactured to a P4 (ABEC-7) tolerance class, it guarantees superior running accuracy and high-speed capability, making it an ideal choice for precision spindles and other high-performance machinery. Its preloaded and lubricated configuration ensures immediate, reliable performance upon installation.
S71920 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning | Benefit |
|---|---|---|
| S71920 | Basic bearing designation (100mm bore, 140mm OD, 20mm width) | Defines the core bearing dimensions. |
| ACE | 25° contact angle, phenolic cage, high-precision design | Optimized for high-speed operation and high rigidity. |
| P4A | Tolerance class P4 (ABEC-7), with specific running accuracy requirements | Ensures ultra-precision and minimal vibration for critical applications. |
S71920 ACE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and robust construction enable the bearing to support significant combined loads, offering excellent stability and resistance to deflection under operation.
- Superior High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces and friction, contributing to a high limiting speed of 11,500 rpm. This makes it a true high-speed bearing.
- Precision Engineering: Manufactured to P4 tolerance with tight dimensional control on bore, outside diameter, and width, ensuring predictable performance and ease of integration into precision assemblies.
- Ready-to-Install: The bearing comes prelubricated and is ready for immediate use, simplifying the installation process and reducing maintenance requirements.
S71920 ACE/P4A Bearing Typical Application Areas
The S71920 ACE/P4A is ideally suited for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Precision Spindles
- Robotic Drives and Servo Motors
- High-Speed Precision Instruments
