71808 ACD/HCP4
Hybrid Ceramic Super Precision Bearings
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71808 ACD/HCP4 Bearing Product Overview & Core Advantages
The 71808 ACD/HCP4 is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional speed capability and rigidity. Designed to accommodate combined loads (radial and axial) in one direction, it features a 25° contact angle for optimal axial load capacity. Manufactured to P4 (ABEC-7) tolerance class, this bearing delivers superior running accuracy. Its compact design, combined with a phenolic cage and ceramic balls, makes it an ideal solution for high-speed spindles and precision machinery demanding maximum performance and reliability.
71808 ACD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71808 | Basic bearing series and size designation (40mm bore, 52mm OD, 7mm width) |
| ACD | 25° contact angle design, optimized for high-speed operation |
| HCP4 | Hybrid Ceramic (Silicon Nitride) balls with P4 precision tolerance |
71808 ACD/HCP4 Bearing Structural Features & Performance Benefits
High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, enabling the bearing to achieve a limiting speed of 43,000 rpm. This makes it exceptionally suited for ultra-high-speed applications.
Enhanced Rigidity and Load Capacity: The 25° contact angle provides excellent resistance to axial loads while maintaining good radial load capacity. The P4 precision grading ensures minimal runout and vibration, contributing to superior system rigidity.
Hybrid Ceramic Advantage: The use of silicon nitride ceramic balls offers superior characteristics including lower friction, reduced operating temperature, electrical insulation, and extended service life compared to all-steel designs, especially in high-speed environments.
Pre-optimized for Performance: This bearing comes prelubricated and is ready for installation, ensuring immediate optimal performance upon startup.
71808 ACD/HCP4 Bearing Typical Application Areas
The 71808 ACD/HCP4 is specifically designed for demanding, high-speed precision equipment, including:
- Machine Tool Spindles (High-speed milling, grinding, and drilling)
- Precision Robotics and Automation Arms
- High-Frequency Motors and Spindles
- Medical and Dental Equipment (e.g., high-speed handpieces)
- Aerospace Instrumentation and Guidance Systems
