71920 ACB/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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71920 ACB/HCP4ADT Bearing Product Overview & Core Advantages
The 71920 ACB/HCP4ADT is a high-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 rigidity, and the ability to handle significant combined loads. Its construction with a phenolic cage and ceramic balls enables outstanding high-speed performance, making it an ideal solution for high-reliability machinery.
71920 ACB/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71920 | Basic bearing series and size designation |
| ACB | Angular Contact Bearing with a 25° contact angle |
| HC | Hybrid Ceramic (Ceramic balls with steel rings) |
| P4A | High precision tolerance class (superior to ABEC 7) |
| DT | Duplex Tandem arrangement (2 bearings matched for increased axial load capacity in one direction) |
71920 ACB/HCP4ADT Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex tandem arrangement and 25° contact angle provide exceptional stiffness and enable the bearing to withstand heavy combined radial and axial loads.
Superior High-Speed Performance: The combination of a lightweight phenolic cage and ceramic balls reduces centrifugal forces and friction, allowing for a high limiting speed of 15,000 rpm.
Enhanced Durability & Precision: The P4A tolerance class ensures minimal runout and vibration for ultra-precise applications. The hybrid ceramic construction offers increased durability and longer service life under high-speed conditions.
Preload & Matched Set: The bearings are supplied as a preloaded, matched set, ensuring immediate optimal performance and simplified installation without the need for additional adjustment.
71920 ACB/HCP4ADT Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles (High-speed milling and grinding)
- Precision Robotics and Automation Equipment
- High-Frequency Motors and Spindles
- Aerospace & Defense Actuation Systems
- Medical & Dental High-Speed Handpieces
