7011 ACD/PA9ADBC
7000 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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7011 ACD/PA9ADBC Bearing Product Overview & Core Advantages
The 7011 ACD/PA9ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring high rigidity and accurate rotational performance. This metric system bearing features a back-to-back (DB) matched arrangement, providing exceptional stability under combined loads (radial and axial). Its moderate preload (Class C) ensures consistent performance with minimal deflection, making it ideal for high-precision machinery where rigidity and reliability are paramount. The open design allows for custom lubrication schemes to optimize performance for specific operational conditions.
7011 ACD/PA9ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle for handling combined loads. |
| D | Duplex (two bearings supplied as a matched set). |
| DB | Back-to-Back arrangement, providing high moment rigidity. |
| PA9A | High precision tolerance class, ensuring minimal runout and superior running accuracy. |
| Open | No integral seals or shields, allowing for custom lubrication and high-speed operation. |
7011 ACD/PA9ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a wide effective spread, significantly increasing system rigidity and resistance to moment loads. This design enables the bearing to handle substantial combined radial and axial loads simultaneously. The 25° contact angle is optimized for axial load carrying capacity.
Precision & High-Speed Performance: Manufactured to PA9A tolerance class, this bearing guarantees exceptional dimensional accuracy and running precision. The phenolic cage offers excellent strength-to-weight ratio and is suitable for high-speed applications, contributing to the limiting speed of 34,000 rpm. The open design reduces friction and heat generation at high speeds.
Durability & Material Quality: Constructed from chrome steel for both rings and balls, the bearing provides high fatigue life and wear resistance. The matched set ensures pre-calibrated performance, reducing installation time and ensuring optimal preload.
7011 ACD/PA9ADBC Bearing Typical Application Areas
- Machine Tool Spindles: For high-precision milling, grinding, and turning centers requiring extreme rigidity and accuracy.
- High-Frequency Spindles: In PCB drilling and precision engraving machines.
- Industrial Pumps & Compressors: Where reliable performance under combined loads is critical.
- Precision Robotics: In robotic arm joints and rotary actuators demanding high positional accuracy.
