S7008 CD/P4ADGB
Sealed Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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S7008 CD/P4ADGB Bearing Product Overview & Core Advantages
The S7008 CD/P4ADGB is a precision double row angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. Its metric design features a 40 mm bore, 68 mm outside diameter, and 30 mm width, offering a compact and rigid solution. This bearing is distinguished by its P4A tolerance class, ensuring ultra-precise running accuracy, and its Universal Matchable (SU) designation, allowing for flexible mounting in preloaded arrangements. The core advantage lies in its ability to simultaneously support combined loads (radial and bidirectional axial loads) with high rigidity, making it an ideal choice for high-speed and high-precision machinery.
S7008 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7008 | Bearing series and size designation (40mm bore) | Identifies the specific bearing dimensions. |
| CD | Contact angle of 15° and high rigidity design | Optimized for handling combined loads. |
| P4A | Tolerance class (higher than ABEC 7) | Guarantees extremely high running accuracy and low vibration. |
| DGB | Universal Matchable (SU) bearing set | Allows for simplified mounting in back-to-back (DB), face-to-face (DF), or tandem (DT) arrangements to achieve the required preload and stiffness. |
S7008 CD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row angular contact design, with a 15° contact angle, provides significantly higher radial and axial rigidity compared to single row bearings. This enables the bearing to effectively support combined loads from multiple directions, ensuring stable operation under demanding conditions. The phenolic cage contributes to this robust construction.
Precision & High-Speed Performance: Manufactured to a P4A tolerance class, this bearing offers minimal runout and exceptional rotational accuracy. The optimized internal geometry, combined with the lightweight phenolic cage, allows for a high limiting speed of 41,000 rpm, making it suitable for very demanding high-speed applications.
Sealed & Pre-lubricated for Longevity: As a sealed bearing, it is protected from contamination. It comes pre-lubricated with grease, offering a wide operating temperature range from -30°C to 110°C. This combination provides a maintenance-free, long-service-life solution, reducing total cost of ownership.
S7008 CD/P4ADGB Bearing Typical Application Areas
The S7008 CD/P4ADGB is designed for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Where the highest levels of running accuracy are required.
- High-Frequency Motors and Spindles: In applications such as PCB drilling and routing.
- Industrial Pumps and Compressors: For handling axial and radial loads in rotating assemblies.
- Robotics and Automation: In high-precision joints and rotary axes.
