71904 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71904 ACE/HCP4A Bearing Product Overview & Core Advantages
The 71904 ACE/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional speed and rigidity. This precision bearing features a 25° contact angle and ceramic balls, enabling superior performance under combined radial and axial loads. With its P4 (ABEC-7) tolerance class and phenolic cage, it delivers outstanding rotational accuracy and stability at limiting speeds up to 95,000 rpm, making it ideal for demanding high-speed machinery.
71904 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71904 | Basic bearing series with 20mm bore, 37mm OD, 9mm width |
| ACE | Angular Contact design with 25° contact angle |
| HCP4A | Hybrid Ceramic construction with P4 precision class and preload |
71904 ACE/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and heat generation, enabling higher operating speeds and extended service life.
High-Speed Capability: The phenolic resin cage provides excellent dimensional stability at high speeds, while the optimized bearing dimensions and 25° contact angle ensure smooth operation up to 95,000 rpm.
Precision Performance: Manufactured to P4 (ABEC-7) tolerance class with tight dimensional tolerances, this bearing delivers exceptional running accuracy and minimal vibration for precision applications.
Preload Availability: The bearing is available with preload, enhancing system rigidity and reducing deflection under load for improved positioning accuracy.
71904 ACE/HCP4A Bearing Typical Application Areas
- High-speed machine tool spindles and machining centers
- Precision grinding applications requiring minimal runout
- High-frequency motor spindles and servo motors
- Medical equipment including dental handpieces and surgical tools
- Aerospace components and instrumentation systems
- Semiconductor manufacturing equipment
