S71920 ACE/HCP4A
Hybrid Ceramic Super Precision 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/HCP4A Bearing Product Overview & Core Advantages
The S71920 ACE/HCP4A is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a single-row bearing with a 25° contact angle, it is engineered to handle high combined loads, accommodating significant axial loads in one direction alongside radial loads. Its P4 (ABEC-7) tolerance class ensures ultra-precise running accuracy, while the combination of a phenolic cage and ceramic balls enables superior high-speed performance and extended service life. This bearing is preloaded and pre-lubricated, making it a ready-to-install, high-reliability solution for compact, high-stiffness arrangements.
Model Code Breakdown
| Model Segment | Technical Meaning | Advantage |
|---|---|---|
| S71920 | Precision angular contact ball bearing series with 100mm bore, 140mm OD, 20mm width | Defines the core bearing dimensions and series |
| ACE | 25° contact angle, phenolic cage, high-precision design | Optimized for high-speed operation and rigidity |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Reduced weight, lower friction, and higher limiting speed |
| P4A | P4 tolerance class (ABEC-7), with specific running accuracy deviations | Guarantees ultra-precision bearing performance for critical applications |
S71920 ACE/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and minimizes wear, directly contributing to the high limiting speed of 13,700 rpm. This construction also provides superior resistance to electrical erosion.
Phenolic Cage Design: The lightweight and robust phenolic resin cage ensures stable operation at high speeds, excellent dimensional stability, and compatibility with a wide range of lubricants.
25° Contact Angle & Preload: The 25° contact angle is optimized to handle substantial one-direction axial loads and radial loads simultaneously. The bearing is supplied with a preload, ensuring immediate high rigidity and precise rotational accuracy upon installation, which is critical for minimizing deflection in spindles.
Sealed & Lubricated: As a sealed bearing, it is protected from contamination. The factory-applied lubrication is suitable for the specified temperature range of -30°C to 110°C, offering long-term, maintenance-free operation.
S71920 ACE/HCP4A Bearing Typical Application Areas
The S71920 ACE/HCP4A is ideally suited for high-performance machinery where speed, precision, and reliability are paramount. Key application areas include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units (APUs).
- High-Speed Motors and Drives: Electric vehicle motors, compressor shafts, and turbine equipment.
