7012 CD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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7012 CD/P4ADBB Bearing Product Overview & Core Advantages
The 7012 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) matched pair is preloaded to Light / Class B standards, ensuring minimal axial and radial play for superior system stability. Its primary advantage lies in its ability to handle combined loads—simultaneously supporting significant radial loads and thrust loads in both directions. Manufactured to a P4A tolerance class, this bearing is ideal for high-precision, high-rigidity, and high-speed applications where uncompromising performance is critical.
7012 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Basic bearing series, indicating a 60 mm bore, 95 mm OD, and 36 mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate thrust capacity. |
| D | Indicates the bearing is part of a duplex (matched pair) set. |
| P4A | Denotes a high-precision tolerance class with enhanced running accuracy for spindle applications. |
| DB | Specifies the Back-to-Back mounting arrangement, which provides high moment rigidity. |
| B | Indicates the Light preload level applied to the matched set. |
7012 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The back-to-back duplex arrangement creates a wide effective spread between load centers, significantly increasing the bearing's resistance to moment loads and providing exceptional system rigidity. The light preload eliminates internal clearance, ensuring precise shaft positioning and reducing vibration under high-speed operation.
Superior Load Capacity: The angular contact design with a 15° contact angle is engineered to handle combined radial and axial loads simultaneously. With a dynamic load rating of 14,918 lbf and a static load rating of 15,638 lbf, it offers reliable performance in demanding conditions.
Optimized High-Speed Performance: The phenolic resin cage is lightweight and possesses excellent slip characteristics, contributing to lower friction, reduced centrifugal forces, and a high limiting speed of 34,000 rpm. The bearing is supplied lubricated for immediate operation.
Precision Engineering: Manufactured from chrome steel and held to P4A precision tolerances, this bearing guarantees minimal runout and consistent performance, which is critical for applications requiring extreme accuracy.
7012 CD/P4ADBB Bearing Typical Application Areas
The 7012 CD/P4ADBB is ideally suited for high-performance machinery where precision and speed are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Applications requiring high positional accuracy and low noise.
- High-Frequency Motors and Spindles: Where rapid acceleration and deceleration are routine.
- Industrial Pumps and Compressors: For robust performance under combined loads.
- Advanced Robotics and Automation: Joints and axes demanding high rigidity and precision.
