7008 CEGA/HCP4AH1
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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7008 CEGA/HCP4AH1 Bearing Product Overview & Core Advantages
The 7008 CEGA/HCP4AH1 is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. As a single bearing designed for universal matching (SU), it enables flexible arrangement in pairs to handle combined loads efficiently. Its core advantages include superior high-speed capability with a limiting speed of 56,000 rpm, enabled by its ceramic balls and phenolic cage. Manufactured to P4A tolerance class, it delivers extreme dimensional precision and rotational accuracy, making it ideal for high-rigidity applications requiring minimal runout and vibration.
7008 CEGA/HCP4AH1 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| CEGA | Enhanced design with ceramic balls and phenolic cage | Reduced friction, higher speed capability, and superior performance under temperature variation |
| HC | Hybrid Ceramic (balls) | Lower density, electrical insulation, and extended service life |
| P4A | High Precision Tolerance Class | Tighter dimensional and running accuracy for critical applications |
| A | Extra Light Preload | Minimized deflection and optimized stiffness for high-speed operation |
7008 CEGA/HCP4AH1 Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, enabling exceptional high-speed performance up to 56,000 rpm. This hybrid design also provides electrical insulation and superior resistance to wear.
Phenolic Resin Cage: The phenolic cage offers excellent dimensional stability and low friction at high speeds, contributing to smoother operation and reduced heat generation compared to metal cages.
15° Contact Angle & Universal Matchable Design: The 15° contact angle provides an optimal balance between radial and axial load capacity. Being Universal Matchable (SU), two bearings can be paired in any configuration (back-to-back, face-to-face, or tandem) to handle combined loads and moments, offering design flexibility for high-rigidity systems.
Precision Engineering: Manufactured to P4A tolerance class with extremely tight bore, outer diameter, and width tolerances, this bearing ensures precise shaft positioning, minimal vibration, and consistent performance in demanding applications.
7008 CEGA/HCP4AH1 Bearing Typical Application Areas
- High-Speed Machine Tool Spindles: For CNC milling, grinding, and drilling machines requiring high rotational accuracy and speed.
- Precision Robotics: In robot arm joints and gears where high rigidity and minimal deflection are critical.
- Aerospace & Defense Systems: In gyroscopes, navigation instruments, and auxiliary power units (APUs).
- Medical Equipment: For high-speed dental handpieces and surgical drill motors.
- Semiconductor Manufacturing: In wafer handling robots and precision stages.
