71804 CD/HCP4DGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71804 CD/HCP4DGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. As a universal matchable (SU) bearing supplied in a pre-lubricated set of two, it enables simplified installation and optimal performance in high-speed configurations. Its extra light preload (Class A) and P4 tolerance class ensure smooth operation with minimal vibration, making it ideal for high-precision spindles and other critical machinery where rigidity and rotational accuracy are paramount.
71804 CD/HCP4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71804 | Basic bearing designation (20mm bore, 32mm OD, 14mm width) |
| CD | 15° contact angle design |
| HC | Hybrid ceramic balls (ceramic balls with steel rings) |
| P4 | High precision tolerance class |
| DGA | Universal matchable bearing set (two bearings) |
Structural Features and Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls provides superior performance in high-speed applications, reducing friction, heat generation, and wear while enabling operation at higher limiting speeds (100,500 rpm).
Precision Engineering: Manufactured to P4 tolerance class with tight dimensional control on bore diameter, outside diameter, and width, ensuring consistent performance and easy integration into precision assemblies.
Optimized Cage Design: The phenolic cage offers excellent performance at high speeds, contributing to the bearing's exceptional rotational characteristics and stability.
Universal Matchability: As universal matchable (SU) bearings supplied in sets of two, they can be arranged in various configurations (back-to-back, face-to-face, or tandem) to accommodate different load conditions and stiffness requirements.
71804 CD/HCP4DGA Bearing Typical Application Areas
- High-speed machine tool spindles and machining centers
- Precision grinding spindles and dental equipment
- High-frequency motors and servo drives
- Aerospace instrumentation and navigation systems
- Semiconductor manufacturing equipment
- Laboratory and analytical instruments
