7213 CD/P4ADGC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7213 CD/P4ADGC Bearing Product Overview & Core Advantages
The 7213 CD/P4ADGC is a precision angular contact ball bearing designed for demanding applications requiring high rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-set pair, it is engineered to accommodate combined loads—simultaneously handling significant radial and axial forces from both directions. Its P4A tolerance class ensures exceptional dimensional and running accuracy, making it ideal for high-speed spindles and other precision machinery where superior performance and reliability are critical.
7213 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| 7213 | Basic Series & Size | Indicates a metric 70-series angular contact bearing with a 65mm bore, 120mm OD, and 46mm width. |
| CD | Contact Angle & Design | Specifies a 15° contact angle and a specific internal design optimized for universal matching. |
| P4A | Tolerance Class | Denotes a high-precision grade with tight tolerances on bore, outside diameter, and width for superior running accuracy. |
| DGC | Preload & Matching | Indicates a Moderate (Class C) preload and that the bearing is part of a Universal Matchable (SU) pair, ready for installation in a back-to-back or face-to-face arrangement. |
7213 CD/P4ADGC Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design and universal matching of two bearings create a highly rigid system capable of supporting substantial combined radial and axial loads. The 15° contact angle provides an optimal balance between axial load capacity and speed capability.
High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 32,500 rpm. The bearing comes pre-lubricated to ensure immediate and reliable operation.
Precision Engineering: Manufactured to P4A tolerance class with a chrome steel construction, this bearing guarantees minimal runout and vibration, which is essential for the accuracy of high-speed machining and precision equipment.
7213 CD/P4ADGC Bearing Typical Application Areas
The 7213 CD/P4ADGC is ideally suited for high-performance applications across various industries, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications demanding extreme rotational accuracy and rigidity.
- High-Frequency Motors and Spindles: Where rapid acceleration and deceleration are required.
- Industrial Pumps and Compressors: For handling significant axial and radial loads reliably.
