71930 ACD/HCP4ALDT
Hybrid Ceramic Super Precision Bearings
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71930 ACD/HCP4ALDT Bearing Product Overview & Core Advantages
The 71930 ACD/HCP4ALDT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) matched set is preloaded and manufactured to a P4A tolerance class, ensuring ultra-high running accuracy and system rigidity. Its core advantages include the ability to handle significant combined loads (radial and axial), superior high-speed capability facilitated by a phenolic cage and ceramic balls, and outstanding operational stability. This bearing is engineered for high reliability in precision machinery.
71930 ACD/HCP4ALDT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71930 | Basic bearing series and size designation (150mm bore, 210mm OD). |
| AC | 25° Contact Angle. |
| D | Duplex bearing design. |
| HC | Hybrid Ceramic (Ceramic balls with steel rings). |
| P4A | Ultra-high precision tolerance class. |
| L | Light preload. |
| DT | Duplex Tandem arrangement of the two bearings in the set. |
71930 ACD/HCP4ALDT Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The duplex tandem arrangement and built-in preload create an exceptionally rigid bearing system, capable of withstanding high combined loads and providing precise axial positioning.
Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls reduces centrifugal forces, enabling a high limiting speed of 11,000 rpm. The 25° contact angle is optimized for high-speed axial loads.
Enhanced Durability and Longevity: Hybrid ceramic construction provides increased stiffness, reduced operating temperature, and extended service life, especially in high-speed or marginally lubricated conditions. The bearings are pre-lubricated for immediate operation.
Ultra-Precision: Manufactured to P4A tolerance standards, this bearing ensures minimal runout and vibration, which is critical for applications demanding the highest levels of rotational accuracy.
71930 ACD/HCP4ALDT Bearing Typical Application Areas
This high-precision, high-speed bearing set is ideally suited for advanced machinery where accuracy and reliability are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric motors requiring high rotational speeds.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision instruments.
