7009 ACD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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7009 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 7009 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rigidity and rotational accuracy. This back-to-back matched set (DB arrangement) is preloaded to Light / Class B specifications, ensuring optimal performance under combined radial and axial loads. Manufactured to P4A tolerance class, it delivers superior running accuracy and is ideal for high-speed, high-precision machinery where uncompromising reliability is paramount.
7009 ACD/P4ADBB 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 for superior dimensional and running accuracy. |
| DB | Duplex Back-to-Back arrangement. This configuration provides high moment rigidity and is optimized to handle combined loads. |
7009 ACD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) design creates a rigid bearing system that effectively resists moment loads and supports combined radial and axial loads from both directions. The 25° contact angle is optimized for substantial axial load carrying capacity.
Precision & High-Speed Performance: Built to P4A tolerance class with a phenolic resin cage, this bearing ensures minimal vibration and stable operation at high rotational speeds, with a limiting speed of 41,000 rpm. The light preload minimizes axial and radial play for precise shaft positioning.
Durability & Reliability: Constructed from chrome steel for both rings and balls, the bearing offers excellent wear resistance and long service life. The open design allows for customized lubrication schemes to suit specific operational requirements within a temperature range of -30°C to 110°C.
7009 ACD/P4ADBB Bearing Typical Application Areas
- Machine Tool Spindles for milling, grinding, and turning centers
- High-frequency Spindles in PCB drilling and routing machines
- Precision gearboxes and high-speed pumps
- Robotic arm joints and precision rotary tables
- Medical and laboratory equipment requiring high rotational accuracy
