7005 CEGA/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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7005 CEGA/HCP4A Bearing Product Overview & Core Advantages
The 7005 CEGA/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. Engineered to a P4A tolerance class, it offers superior dimensional stability and running accuracy. Its ceramic balls and phenolic cage enable outstanding high-speed capabilities up to 85,000 rpm, while the 15° contact angle provides excellent resistance to combined loads (radial and axial). As a universally matchable bearing supplied in sets of two, it allows for flexible preload configurations, making it ideal for high-rigidity and high-reliability spindle arrangements.
7005 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| 7005 | Basic bearing series with 25mm bore, 47mm OD | Standard bearing dimensions for common shaft applications |
| CE | 15° contact angle design | Optimized for combined radial and axial loads |
| GA | Light preload designation | Reduces deflection, improves system rigidity |
| HCP4A | High-precision tolerance class (P4A) | Ultra-precise running accuracy for precision bearing applications |
7005 CEGA/HCP4A Bearing Structural Features & Performance Benefits
Advanced Material Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces, enabling superior high-speed performance while providing excellent wear resistance and extended service life.
Phenolic Resin Cage: The lightweight phenolic cage offers exceptional dimensional stability at high temperatures and speeds, contributing to the bearing's maximum limiting speed of 85,000 rpm while reducing vibration and noise.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and optimal system rigidity in precision applications.
Load Capacity Optimization: With a 15° contact angle and optimized internal geometry, the bearing effectively handles combined loads while maintaining stable operation under high-speed conditions.
7005 CEGA/HCP4A Bearing Typical Application Areas
Machine Tool Spindles: High-speed machining centers, CNC milling machines, and grinding spindles requiring precision bearings with exceptional running accuracy and high rigidity.
High-Speed Motors: Electric motor spindles, high-frequency spindles, and servo motors where ceramic hybrid bearings provide superior performance at extreme rotational speeds.
Precision Instrumentation: Measuring equipment, optical systems, and laboratory instruments demanding the highest levels of accuracy and minimal vibration.
Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units requiring reliable performance in demanding environments.
Semiconductor Manufacturing: Wafer handling equipment, precision positioning stages, and cleanroom applications where contamination control and precision are critical.
