7005 ACD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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7005 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7005 ACD/P4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set features an Extra Light (Class A) preload and adheres to the stringent P4A tolerance class, ensuring superior running precision and minimal vibration. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads in both directions—simultaneously, making it ideal for high-speed, high-rigidity spindles and precision machinery.
7005 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7005 | Basic bearing series, indicating a 25 mm bore, 47 mm OD, and 24 mm width. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex Back-to-Back (DB) arrangement. Two bearings are universally matched as a set. |
| P4A | High precision tolerance class, exceeding ABEC 7 standards for dimensional and running accuracy. |
| DBA | Specifies a Duplex Back-to-Back arrangement with an Extra Light (Class A) preload. |
7005 ACD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, providing exceptional operational stability.
Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 3330 lbf, this bearing is engineered to handle demanding combined radial and axial loads simultaneously.
Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 75,000 rpm. The bearings are pre-lubricated for immediate operation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore, outside diameter, and width, this bearing ensures minimal runout and vibration for ultra-precise applications.
7005 ACD/P4ADBA Bearing Typical Application Areas
The 7005 ACD/P4ADBA is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and high-speed electric motors.
- Medical and Laboratory Equipment: Centrifuges and other precision rotary devices.
