7213 ACD/P4ADFC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7213 ACD/P4ADFC Bearing Product Overview & Core Advantages
The 7213 ACD/P4ADFC is a precision duplex angular contact ball bearing specifically designed for applications requiring exceptional rotational accuracy and rigidity. This matched bearing set in a Face-to-Face (DF) arrangement is preloaded to Moderate / Class C specifications, delivering superior system stiffness and precise shaft positioning. Its optimized 25° contact angle enables it to handle significant combined radial and axial loads simultaneously, making it an ideal choice for high-precision, high-performance machinery where reliability is paramount.
7213 ACD/P4ADFC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact, Duplex arrangement. Indicates the bearing is supplied as a pre-mounted and pre-adjusted pair. |
| P4A | High precision tolerance class (superior to ABEC 7), ensuring extremely tight running accuracy for critical applications. |
| DF | Face-to-Face mounting. This arrangement provides high rigidity and is effective for withstanding moment loads. |
| C | Specifies the moderate preload level, balancing rigidity, speed, and thermal performance. |
7213 ACD/P4ADFC Bearing Structural Features & Performance Benefits
High Rigidity & System Stability: The duplex DF arrangement and moderate preload create an exceptionally stiff bearing system, minimizing deflection under load and ensuring precise shaft guidance. This is critical for maintaining accuracy in machining and positioning applications.
Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 23,400 lbf, this bearing set is engineered to handle demanding combined loads effectively, providing reliable performance in rigorous operating conditions.
Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the P4A precision grade ensures smooth operation. This combination supports a high limiting speed of 36,000 rpm.
Precision Engineering: Manufactured from high-grade chrome steel for both rings and balls, and adhering to strict dimensional tolerances (bore and OD tolerance: -0.004mm to 0), this bearing guarantees consistent, high-accuracy performance.
7213 ACD/P4ADFC Bearing Typical Application Areas
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring utmost precision and rigidity.
- Precision Gearboxes: In applications demanding accurate shaft alignment and high torque transmission.
- High-Frequency Spindles: Used in PCB drilling, engraving, and other high-RPM machining operations.
- Industrial Pumps & Compressors: Where reliable performance under combined loads is essential.
- Robotic Arm Joints & Precision Rotary Axes: Providing the necessary stiffness and rotational accuracy for automated systems.
