71920 FE/HCP4ALDT
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
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71920 FE/HCP4ALDT Bearing Product Overview & Core Advantages
The 71920 FE/HCP4ALDT is a super-precision angular contact ball bearing engineered for the most demanding high-performance applications. This duplex tandem (DT) matched set is preloaded and ready for installation, delivering exceptional rotational accuracy and system rigidity. Its defining features include a P4A tolerance class for ultra-precision, a phenolic resin cage for high-speed capability, and ceramic balls (Si3N4) that significantly reduce centrifugal forces, enabling superior high-speed performance and extended service life. This bearing is pre-lubricated and designed to handle combined loads with high reliability.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71920 | Basic bearing series and size designation (100mm bore, 140mm OD). |
| FE | Steel cage design with a fixed contact angle. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls. |
| P4A | Tolerance class exceeding ABEC 7/ISO P4, indicating ultra-high precision for bore, OD, and width. |
| DT | Duplex Tandem arrangement. Two bearings are matched and preloaded to share the axial load in the same direction, maximizing axial rigidity and load capacity. |
71920 FE/HCP4ALDT Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of steel rings and silicon nitride (Si3N4) ceramic balls reduces weight, minimizes friction, and provides superior resistance to wear and heat generation. This is critical for achieving the high limiting speed of 16,000 rpm.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures stable operation at high speeds and offers excellent compatibility with lubricants.
- Preloaded Duplex Tandem (DT) Set: This matched arrangement is supplied as a ready-to-install unit, pre-loaded to eliminate internal clearance. This delivers maximum system rigidity, precise shaft positioning, and improved dynamic response.
- High-Precision P4A Tolerance: Tighter dimensional and running accuracy guarantees exceptional performance in applications requiring minimal runout and vibration.
- Optimized Load Capacity: The 18° contact angle and tandem configuration are engineered to handle significant combined loads, with a primary focus on high thrust loads in one direction.
71920 FE/HCP4ALDT Bearing Typical Application Areas
The 71920 FE/HCP4ALDT is ideally suited for high-tech machinery where speed, precision, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, drilling, and grinding spindles.
- Precision Robotics: High-accuracy robotic arms and joints.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- High-Frequency Motors and Spindles: Motors for PCB drilling and dental handpieces.
