71919 ACD/HCP4AH1
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71919 ACD/HCP4AH1 Bearing Product Overview & Core Advantages
The 71919 ACD/HCP4AH1 is a single-row angular contact ball bearing engineered for applications demanding high precision and superior rigidity. Operating under a P4A tolerance class, it is designed to accommodate high combined loads (radial and axial) efficiently, with a 25° contact angle optimizing axial load capacity. Its construction features a phenolic cage and ceramic balls, contributing to lower friction, higher limiting speeds, and extended service life. This bearing is preloaded and comes lubricated, ensuring immediate operational readiness and consistent performance in demanding environments.
71919 ACD/HCP4AH1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71919 | Basic bearing series and size designation | Defines the core dimensions: 95mm bore, 130mm OD, 18mm width. |
| AC | Angular Contact design | Optimized for combined radial and axial loads. |
| D | High contact angle (25°) | Enhances axial load carrying capability. |
| HC | Hybrid Ceramic (Ceramic balls, steel rings) | Reduces weight, friction, and heat generation; increases speed capability and lifespan. |
| P4A | High Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for high-precision applications. |
| H | Preload | Bearings are supplied with a preload to eliminate internal clearance, maximizing system rigidity. |
71919 ACD/HCP4AH1 Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design and 25° contact angle provide excellent resistance to combined loads. The application of a preload eliminates internal clearance, resulting in a very stiff bearing arrangement that minimizes deflection under load.
High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, allowing for a limiting speed of 16,000 rpm. This makes it an ideal high-speed bearing.
Extended Service Life and Reliability: Hybrid ceramic construction offers superior wear resistance and is less susceptible to lubrication failure. The bearing is supplied lubricated, ensuring optimal performance from startup and reducing maintenance requirements.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, this bearing ensures smooth, quiet, and accurate operation in the most demanding precision applications.
71919 ACD/HCP4AH1 Bearing Typical Application Areas
The 71919 ACD/HCP4AH1 is suited for high-performance machinery where precision, speed, and rigidity are critical. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary actuators requiring high positional accuracy.
- High-Frequency Motors and Spindles: Applications demanding low vibration and high rotational accuracy.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
