7008 CE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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7008 CE/HCP4ADT Bearing Product Overview & Core Advantages
The 7008 CE/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) arrangement consists of two preloaded bearings, enabling it to handle high axial loads in one direction with superior rigidity. Manufactured to P4A tolerance class, it guarantees ultra-precise running accuracy. Key advantages include its ability to operate at high speeds (up to 43,000 rpm), facilitated by a lightweight phenolic cage and ceramic balls, making it an ideal solution for high-precision, high-reliability machinery.
7008 CE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing series and size designation (40mm bore, 68mm OD). |
| C | Specifies a 15° contact angle, optimized for high axial load capacity. |
| E | Indicates an optimized internal design for enhanced performance. |
| HC | Signifies the use of Hybrid Ceramic balls (steel rings with ceramic balls). |
| P4A | Denotes an ABEC 7 / ISO P4A super-precision tolerance class. |
| DT | Identifies the bearing as a Duplex Tandem preloaded set of two bearings. |
7008 CE/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Load Capacity: The duplex tandem arrangement and 15° contact angle create an exceptionally rigid assembly capable of supporting very high axial loads in one direction, making it ideal for preloaded spindle systems.
- High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly reduces rotating mass, enabling stable operation at the high limiting speed of 43,000 rpm.
- Precision & Long Service Life: Manufactured to P4A tolerance class with a preload, this bearing ensures minimal runout and precise shaft positioning. The hybrid ceramic design offers superior wear resistance and a longer operational lifespan, especially in high-speed applications.
- Thermal Stability: The phenolic cage and ceramic balls contribute to better thermal stability and reduced heat generation at high speeds.
7008 CE/HCP4ADT Bearing Typical Application Areas
This high-precision bearing is engineered for advanced machinery where speed, accuracy, and rigidity are paramount. Typical applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications demanding extreme running accuracy.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM electric motors.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instruments.
