7008 ACD/P4ADGB
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 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 7008 ACD/P4ADGB is a precision angular contact ball bearing designed for high-performance applications. As a universally matchable (SU) bearing supplied in a pre-set pair, it is engineered to accommodate combined loads—simultaneously handling significant radial and axial loads in both directions. Its defining characteristics include an exceptionally high rigidity due to its preloaded, matched pair configuration and a P4A super-precision tolerance class, making it ideal for spindles and other demanding, high-accuracy machinery. The open design, combined with a phenolic cage, facilitates high-speed operation up to 56,000 rpm, ensuring reliable performance in the most rigorous conditions.
7008 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | Indicates a super-precision tolerance class, exceeding normal ABEC 7 standards, for exceptional running accuracy. |
| DGB | Signifies a Universal Matchable (SU) pair of bearings, supplied with a Light preload (Class B) for immediate installation and optimal stiffness. |
7008 ACD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The universal matchable (SU) arrangement with a light preload eliminates internal clearance, providing maximum system stiffness and superior rotational accuracy, which is critical for machining precision.
- Superior Load Capacity: The 25° contact angle and robust construction enable the bearing to handle high combined radial and axial loads from both directions efficiently.
- Optimized High-Speed Performance: The lightweight and durable phenolic cage ensures stability and low friction at the limiting speed of 56,000 rpm, reducing centrifugal forces and heat generation.
- Premium Material Construction: Manufactured from chrome steel for both rings and balls, the bearing offers high fatigue life and durability under heavy loads and high-speed conditions.
7008 ACD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Robotics and Automation Equipment
- Medical and Dental Equipment Spindles
- Aerospace Positioning Systems
