7019 ACDGA/HCP4AL
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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7019 ACDGA/HCP4AL Bearing Product Overview & Core Advantages
The 7019 ACDGA/HCP4AL is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This single bearing features a 25° contact angle and an Extra Light (Class A) preload, making it ideal for setups where minimal deflection under load is critical. Its P4A tolerance class ensures ultra-precision operation, while the combination of a phenolic cage and ceramic balls contributes to superior high-speed performance and extended service life. This bearing is engineered to handle combined loads efficiently, with a significant thrust capacity.
7019 ACDGA/HCP4AL Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7019 | Basic bearing series, 95mm bore, 145mm OD, 24mm width | Defines the core bearing dimensions. |
| AC | Angular Contact design | Optimized for combined radial and axial loads. |
| DGA | Universal Matchable (SU), Extra Light Preload (A) | Bearing is part of a universally matchable set of 3, pre-loaded for high system rigidity. |
| HCP4AL | Hybrid Ceramic (HC), P4A Tolerance Class, Lubricated (L) | Indicates ceramic balls for high-speed and longevity, ultra-precision P4A tolerances, and is factory lubricated. |
7019 ACDGA/HCP4AL Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and provides excellent electrical insulation. This directly enables a higher limiting speed and increased durability.
- Optimized Preload and Rigidity: The Extra Light (Class A) preload eliminates internal clearance, resulting in superior stiffness and precise shaft positioning, which is critical for high-precision machining and instrumentation.
- Phenolic Cage for High-Speed Operation: The lightweight and robust phenolic resin cage ensures stable operation at the specified high speeds (15,000 rpm), reducing friction and wear.
- Precision Tolerances: The P4A tolerance class and tight dimensional tolerances on the bore, outside diameter, and width guarantee exceptional running accuracy and consistent performance in the most demanding applications.
7019 ACDGA/HCP4AL Bearing Typical Application Areas
This high-performance precision bearing is ideally suited for applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- High-Speed Machine Tool Spindles: For CNC milling, grinding, and drilling centers.
- Precision Instrumentation: Used in coordinate measuring machines (CMM) and optical scanners.
- Aerospace and Defense Systems: Gyroscopes, radar platforms, and other critical rotational mechanisms.
- High-Frequency Motors and Spindles: Where low inertia and high rotational accuracy are required.
