71920 CE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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71920 CE/HCP4ADT Bearing Product Overview & Core Advantages
The 71920 CE/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) matched set features a P4A tolerance class and is preloaded, delivering superior rotational accuracy, high system rigidity, and reliable operation under combined loads. Its compact design, utilizing ceramic balls and a phenolic cage, is engineered for high-speed operation and extended service life in precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71920 | Basic bearing series and size designation. |
| CE | Contact angle of 15°. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| DT | Duplex Tandem arrangement. Two bearings are matched to share the axial load in the same direction, increasing axial load capacity. |
71920 CE/HCP4ADT Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The duplex tandem (DT) arrangement and preload create a highly rigid bearing system capable of withstanding significant combined radial and axial loads. This configuration is ideal for applications where shaft displacement must be minimized.
High-Speed Performance: The combination of low-density ceramic balls reduces centrifugal forces, while the lightweight phenolic resin cage ensures stability. This synergy allows the bearing to achieve a high limiting speed of 16,000 rpm.
Extended Service Life and Reliability: Ceramic balls offer superior hardness, reduced wear, and resistance to degradation, contributing to a longer operational lifespan. The open seal type allows for customized lubrication regimes optimized for specific high-speed and temperature conditions.
Precision Engineering: Manufactured to a P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing ensures minimal runout and vibration for ultra-precise applications.
71920 CE/HCP4ADT Bearing Typical Application Areas
The 71920 CE/HCP4ADT is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Robotics and Automation Systems
- High-Frequency Machining Centers
- Aerospace Actuation Systems
- Medical and Dental Equipment Spindles
