7209 CD/P4ADGB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7209 CD/P4ADGB Bearing Product Overview & Core Advantages
The 7209 CD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Operating under the stringent P4A tolerance class, this bearing excels in high-speed environments with a limiting speed of 41,000 rpm. Its universal matchable (SU) design allows for flexible mounting arrangements in pairs to support combined loads, handling both radial and axial forces efficiently. The combination of a phenolic cage and a 15° contact angle ensures smooth operation, high rigidity, and reliable performance in precision machinery.
7209 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7209 | Basic bearing series, indicating a 45 mm bore, 85 mm OD, and 38 mm width. |
| CD | Specifies a 15° contact angle and optimized internal design for high-speed operation. |
| P4A | Indicates high-precision tolerance class (exceeding ABEC 7), ensuring minimal runout and superior rotational accuracy. |
| DGB | Denotes Universal Matchable (SU) bearings supplied as a matched set of two, pre-configured for specific preload (Light / Class B). |
7209 CD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The bearing's angular contact design and universal matching capability enable it to withstand significant combined radial and axial loads. When mounted in pairs, they provide a highly rigid support system crucial for precision applications.
High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, enabling stable operation at the high limiting speed of 41,000 rpm. The optimized internal geometry and 15° contact angle further contribute to reduced friction and heat generation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on bore, outside diameter, and width, this bearing guarantees exceptional running accuracy and minimal vibration.
Pre-lubricated & Ready-to-Use: The bearing comes lubricated from the factory, ensuring immediate performance and simplifying the installation process.
7209 CD/P4ADGB Bearing Typical Application Areas
The 7209 CD/P4ADGB is ideally suited for high-precision, high-speed rotational systems, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
