7008 CE/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7008 CE/P4ADBA Bearing Product Overview & Core Advantages
The 7008 CE/P4ADBA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement provides superior stability and can accommodate combined loads (radial and axial loads) simultaneously. Manufactured to P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed spindles and other precision machinery. The extra light preload (Class A) minimizes deflection under light loads, optimizing performance in high-precision scenarios.
7008 CE/P4ADBA 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 | 15° contact angle, optimized for high axial load capacity. |
| E | Optimized internal design for enhanced load rating and performance. |
| P4A | High precision tolerance class (superior to ABEC 7), ensuring extreme dimensional and running accuracy. |
| DB | Duplex Back-to-Back matched arrangement, providing high moment stiffness and stability. |
| A | Extra light preload class, minimizing friction and heat generation at high speeds. |
7008 CE/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and shaft deflection, crucial for maintaining precision under heavy combined loads.
- Superior Load Capacity: The 15° contact angle and optimized internal geometry provide excellent capacity for both radial and axial loads, making it suitable for complex loading conditions.
- High-Speed Capability: The lightweight phenolic cage reduces centrifugal forces, while the precision-ground components and optimized internal clearance contribute to a high limiting speed of 56,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees exceptional running accuracy and low vibration levels.
- Material Quality: Constructed from high-grade chrome steel for rings and balls, ensuring long service life and reliability under demanding operating conditions.
7008 CE/P4ADBA Bearing Typical Application Areas
The 7008 CE/P4ADBA is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring ultra-fine surface finishes.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM electric motors.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
- Aerospace & Defense: Gyroscopes, radar systems, and other precision instrumentation.
