7005 ACE/HCP4AH1
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7005 ACE/HCP4AH1 Bearing Product Overview & Core Advantages
The 7005 ACE/HCP4AH1 is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to a P4A tolerance class, this bearing delivers superior dimensional stability and running accuracy. Its key advantage lies in its ability to accommodate combined loads (radial and axial) simultaneously, making it ideal for high-speed spindles and precision machinery. The combination of ceramic balls and phenolic cage enables superior high-speed performance and reduced rotational mass, while the 25° contact angle provides excellent axial load capacity. This bearing comes prelubricated and is supplied as a universally matched set of 2 bearings, ensuring optimal performance and simplified installation.
7005 ACE/HCP4AH1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 7005 | Standard bore diameter (25mm) and dimension series | Standardized bearing dimensions for easy replacement |
| ACE | 25° contact angle, phenolic cage, high precision | Optimized for high-speed operation and axial load capacity |
| HC | Hybrid ceramic balls (silicon nitride) | Reduced friction, higher limiting speed, and longer service life |
| P4A | ABEC 7 / ISO P4A tolerance class | Exceptional running accuracy and dimensional stability |
| H | Matched bearing set (2 bearings) | Precision matching ensures optimal preload and performance |
7005 ACE/HCP4AH1 Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear. This hybrid design enables higher limiting speeds (75,000 rpm) compared to all-steel bearings, while providing electrical insulation properties.
Phenolic Resin Cage: The phenolic cage material offers excellent strength-to-weight ratio, contributing to reduced rotational inertia and superior performance at high speeds. Its self-lubricating properties and dimensional stability ensure reliable operation across the specified temperature range (-30°C to 110°C).
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore: -0.004mm to 0, OD: -0.004mm to 0), this bearing delivers exceptional running accuracy and minimal vibration. The 25° contact angle provides optimal balance between radial and axial load capacity, with a dynamic load rating of 1784 lbf and static load rating of 878 lbf.
Matched Set Configuration: Supplied as a universally matched pair, these bearings are precision-ground to work together seamlessly, ensuring consistent preload and eliminating the need for selective matching during installation.
7005 ACE/HCP4AH1 Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, CNC milling machines, and grinding spindles
- Precision Medical Equipment: Dental handpieces, surgical tools, and laboratory instrumentation
- Aerospace Systems: Gyroscopes, navigation systems, and auxiliary power units
- High-Speed Motors: Servo motors, spindle motors, and high-frequency generators
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages
- Test & Measurement Equipment: Coordinate measuring machines, optical inspection systems
