7008 ACD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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7008 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7008 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and high rigidity. This matched back-to-back arrangement is preloaded to deliver superior stability under combined radial and axial loads. Manufactured to P4A tolerance class, it guarantees minimal runout and is ideal for high-speed, high-precision machinery where maximum system rigidity and positioning accuracy are critical.
7008 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Indicates a Duplex (two-bearing) set. |
| DB | Specifies the Back-to-Back mounting arrangement, which provides high moment rigidity. |
| P4A | Denotes a high-precision tolerance class with enhanced dimensional and running accuracy. |
| A | Signifies an Extra Light preload for minimal friction and optimal high-speed performance. |
7008 ACD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning.
Superior Load Capacity: The 25° contact angle and dual-row design enable the bearing to handle significant combined radial and axial loads simultaneously.
Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the extra light preload minimizes heat generation, allowing for a high limiting speed of 56,000 rpm.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing ensures smooth, quiet operation with minimal vibration.
7008 ACD/P4ADBA Bearing Typical Application Areas
- Machine Tool Spindles for milling, grinding, and turning centers
- High-frequency Precision Spindles
- High-Speed Machining Centers
- Precision gearboxes and Robotic Drives
- Medical and dental equipment spindles
