71803 CDGA/HCP4
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71803 CDGA/HCP4 Bearing Product Overview & Core Advantages
The 71803 CDGA/HCP4 is a single-row angular contact ball bearing engineered for ultra-high precision and performance. Positioned in the P4 tolerance class, it delivers exceptional running accuracy, making it ideal for applications demanding minimal runout and vibration. A key feature is its universal matchable (SU) design, allowing bearings to be supplied in sets (typically 3) and arranged in various configurations (back-to-back, face-to-face, or tandem) to achieve optimal system rigidity and handle combined loads. The use of a phenolic cage and ceramic balls contributes to its high limiting speed, low friction, and extended service life, even under demanding conditions.
71803 CDGA/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71803 | Basic bearing series and size designation. | Defines the core dimensions: 17mm bore, 26mm OD, 5mm width. |
| CDGA | Contact angle (15°) and preload designation (Extra Light / Class A). | Optimized for high-speed operation with minimal friction and heat generation. |
| HCP4 | Hybrid Ceramic (balls) and P4 tolerance class. | Enables superior high-speed performance, longer life, and operates effectively within a wide temperature range (-30°C to 110°C). |
71803 CDGA/HCP4 Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and provides electrical insulation. This results in dramatically higher limiting speeds and longer service life compared to all-steel bearings.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent guidance for the ceramic balls, contributing to smooth operation at very high RPMs and providing inherent lubrication compatibility.
- Precision P4 Tolerance: Manufactured to ABEC 7 / ISO P4 standards, this bearing ensures extremely tight dimensional and running accuracy, which is critical for applications requiring high positional precision and low vibration.
- Universal Matchable Design (SU): This feature allows for the creation of stiff, preloaded bearing sets from individually supplied bearings, providing design flexibility to precisely manage axial and radial displacement in the application.
71803 CDGA/HCP4 Bearing Typical Application Areas
This high-precision, high-speed angular contact bearing is ideally suited for the most demanding applications, including:
- High-Frequency CNC Spindles for milling, grinding, and routing
- Precision Machine Tool main shafts and ball screws
- High-Speed Motors and turbo-molecular pumps
- Aerospace & Defense instrumentation and control systems
- Semiconductor Manufacturing equipment
