7005 ACD/P4ADFB
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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7005 ACD/P4ADFB Bearing Product Overview & Core Advantages
The 7005 ACD/P4ADFB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched set bearing features a Face-to-Face (DF) arrangement and is manufactured to P4A tolerance class, ensuring superior running precision. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously while providing high system stiffness and stable operation at high speeds. The pre-lubricated design and light preload (Class B) make it an ideal, ready-to-install solution for high-precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7005 | Standard bearing series designation with 25 mm bore, 47 mm OD. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex set (two bearings supplied as a matched pair). |
| P4A | High precision tolerance class, exceeding ABEC 7 standards, for minimal runout and vibration. |
| DF | Face-to-Face mounting arrangement, providing high moment stiffness. |
| B | Light preload (Class B) for reduced friction and optimal high-speed performance. |
7005 ACD/P4ADFB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex face-to-face (DF) arrangement creates a rigid bearing system capable of withstanding significant combined radial and axial loads from both directions. The 25° contact angle is optimized for thrust load handling.
Precision & High-Speed Performance: Manufactured to P4A tolerance class with tight bore and outside diameter tolerances, this bearing ensures minimal vibration and precise shaft positioning. The phenolic resin cage and optimized internal geometry contribute to a high limiting speed of 85,000 rpm, making it suitable for high-speed spindle applications.
Material & Durability: Constructed from chrome steel for both rings and balls, the bearing offers high hardness and wear resistance. The open design allows for customized lubrication regimes, though it is supplied pre-lubricated for immediate use.
7005 ACD/P4ADFB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC lathes.
- High-Speed Motors: Electric spindles and high-frequency motors requiring minimal runout.
- Precision Instrumentation: Measuring equipment, optical scanners, and coordinate measuring machines.
- Robotics: High-accuracy robotic arm joints and rotary tables.
