7008 CE/P4ADBG0
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 7008 CE/P4ADBG0 is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement bearing set is preloaded and manufactured to P4A tolerance class, ensuring superior running accuracy and minimal vibration. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high stability, making it ideal for high-speed, high-precision spindles and machinery.
7008 CE/P4ADBG0 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing series and size designation (40mm bore, 68mm OD, 30mm width). |
| C | Designates a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| E | Indicates optimized internal design for enhanced performance and load rating. |
| P4A | Specifies a high precision tolerance class with enhanced dimensional and running accuracy requirements. |
| DB | Denotes the Duplex Back-to-Back mounting arrangement, providing high rigidity against overturning moments. |
| G0 | Specifies the preload level (light preload in this case) for immediate operational stiffness. |
Structural Features and Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning under combined loads.
Superior Precision: Manufactured to P4A tolerance class with tight bearing dimensions and bore/OD tolerances, this bearing guarantees exceptional running accuracy and minimal runout, which is critical for high-speed applications.
Optimized High-Speed Performance: The 15° contact angle and lightweight phenolic cage reduce centrifugal forces and friction, enabling a high limiting speed of 56,000 rpm. The bearing is pre-lubricated for immediate operation.
High Load Capacity: The optimized internal geometry and chrome steel construction provide a high dynamic and static load rating (4478 lbf / 3442 lbf), ensuring long service life under demanding conditions.
7008 CE/P4ADBG0 Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme precision and rigidity.
- Precision Spindles: PCB drilling, dental handpieces, and other high-RPM applications.
- High-Frequency Motors: Spindles for electric motors operating at very high rotational speeds.
- Robotics: Precision joints and arm linkages where accuracy and stiffness are paramount.
