7008 ACD/P4ADGA
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 ACD/P4ADGA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universal matchable bearing features an extra light preload (Class A) and is manufactured to P4A tolerance class, ensuring superior running accuracy and minimal vibration. Its primary advantage lies in its ability to handle combined loads efficiently, making it ideal for high-speed, high-rigidity applications where precise shaft positioning is critical. The phenolic cage and optimized contact angle of 25° contribute to its outstanding operational characteristics.
7008 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | High precision tolerance class, tighter than ABEC 7, ensuring superior dimensional and running accuracy. |
| DGA | Universal Matchable (SU) designation. Two bearings are a matched set and can be mounted in either a face-to-face or back-to-back arrangement. |
Structural Features and Performance Benefits
- High Rigidity and Precision: The angular contact design and P4A tolerance class provide exceptional system rigidity and running precision, essential for applications with minimal deflection requirements.
- Superior Load Capacity: Engineered to support significant combined radial and axial loads simultaneously, thanks to the optimized 25° contact angle and robust construction.
- High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, enabling a high limiting speed of 56,000 rpm. This makes it an excellent high-speed bearing.
- Universal Matching Capability: As a Universal Matchable (SU) bearing, it offers flexibility in mounting configurations (back-to-back or face-to-face) to achieve the desired preload and stiffness without selective assembly.
- Durable Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability and long service life under demanding conditions.
7008 ACD/P4ADGA Bearing Typical Application Areas
This high-precision bearing is ideally suited for applications where accuracy, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotics and Automation Equipment
- Medical and Dental Equipment
