71919 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71919 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 71919 ACDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single bearing features an extra light preload (Class A) and is manufactured to P4A tolerance class, ensuring superior running accuracy and minimal vibration. Its 25° contact angle is optimized to handle significant combined loads, including high radial and one-directional axial loads simultaneously. The use of a phenolic cage and ceramic balls contributes to its high-speed capability, low friction, and extended service life, making it an ideal choice for high-rigidity and high-speed spindle systems.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71919 | Basic bearing series and size designation |
| AC | Angular Contact design |
| D | High Contact Angle (25° in this case) |
| GA | Universal Matchable (SU designation), allowing for precise preload setting when mounted with other bearings |
| HCP4A | High Precision tolerance class (P4A) with enhanced running accuracy specifications |
71919 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
Optimized Internal Geometry: The 25° contact angle and precision-ground raceways are designed to efficiently support combined loads, providing high axial rigidity and operational stability.
Advanced Materials for High-Speed Operation: The combination of ceramic balls and a lightweight phenolic cage significantly reduces centrifugal forces and friction, enabling a high limiting speed of 16,000 rpm. This construction also offers benefits in reduced heat generation and longer lubricant life.
Superior Precision and Rigidity: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore diameter, outside diameter, and width, this bearing ensures minimal runout and high system rigidity, which is critical for precision machining and positioning.
Universal Matching Capability (SU): As a Universal Matchable bearing, it can be mounted in sets (typically in a 3-bearing arrangement as specified) to achieve a defined preload without selective sorting, simplifying installation and ensuring consistent performance.
71919 ACDGA/HCP4A Bearing Typical Application Areas
The 71919 ACDGA/HCP4A is ideally suited for high-performance machinery where precision, high speed, and rigidity are paramount. Key application areas 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 operating at very high RPM.
- Robotics: High-accuracy joints and arm assemblies.
