7008 CE/HCP4ADGB
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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7008 CE/HCP4ADGB Bearing Product Overview & Core Advantages
The 7008 CE/HCP4ADGB is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This universal matchable (SU) bearing is designed to handle combined loads efficiently, featuring a 15° contact angle optimized for high-speed operation. Its P4A super-precision tolerance ensures minimal runout and vibration, making it ideal for high-rigidity spindle systems. The combination of ceramic balls and phenolic cage delivers superior high-speed capability and reduced rotational inertia.
7008 CE/HCP4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 7008 | Basic bearing size designation (40mm bore, 68mm OD, 30mm width) | Standard bearing dimensions for easy integration |
| CE | Contact angle of 15° | Optimized for high-speed applications with axial loads |
| HC | Hybrid ceramic balls (silicon nitride) | Enhanced speed capability, reduced friction, and longer service life |
| P4A | Super precision tolerance class | Exceptional running accuracy for precision bearing applications |
| DGB | Universal matchable bearing (SU designation) | Can be paired in any combination for preload optimization |
7008 CE/HCP4ADGB Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The combination of chrome steel rings with ceramic balls significantly reduces centrifugal forces, enabling higher limiting speeds (43,000 rpm) while providing electrical insulation properties.
Phenolic Resin Cage: The phenolic cage material offers excellent strength-to-weight ratio, contributing to lower mass inertia and superior performance in high-speed bearing applications.
Universal Matching Capability: As a universal matchable (SU) bearing, the 7008 CE/HCP4ADGB can be mounted in any combination with identical bearings to achieve optimal preload conditions without selective matching.
Precision Engineering: With P4A tolerance class and tight dimensional controls (bore tolerance: -0.004mm to 0), this bearing ensures minimal vibration and maximum running accuracy for high-rigidity applications.
7008 CE/HCP4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and precision grinding spindles
- High-Speed Motors: Industrial spindle motors and high-frequency electric motors
- Precision Instrumentation: Medical equipment, measuring devices, and optical systems
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Semiconductor Manufacturing: Wafer processing equipment and precision positioning stages
