7206 ACD/P4ADBD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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7206 ACD/P4ADBD Bearing Product Overview & Core Advantages
The 7206 ACD/P4ADBD is a duplex back-to-back (DB) matched pair of angular contact ball bearings, representing the pinnacle of precision engineering for demanding applications. This P4A tolerance class bearing is designed to provide exceptional system rigidity and withstand significant combined loads, including heavy radial and thrust loads in both directions. Its DB arrangement and heavy preload (Class D) ensure maximum operational stability, making it an ideal choice for high-precision, high-reliability machinery where minimal axial and radial runout is critical.
7206 ACD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7206 | Standard bearing series and size designation (30mm bore, 62mm OD). | Defines the core bearing dimensions. |
| AC | Angular Contact design. | Optimized for combined loads. |
| D | Duplex Back-to-Back (DB) arrangement. | Provides high moment stiffness and rigidity. |
| P4A | High Precision Tolerance Class (exceeds ABEC 7). | Ensures extremely tight dimensional and running accuracy for superior performance. |
| DB | Specifies the bearings are supplied as a factory-matched Duplex Back-to-Back set. | Guarantees optimal preload and performance without requiring user matching. |
7206 ACD/P4ADBD Bearing Structural Features & Performance Benefits
Superior Rigidity and Load Capacity: The duplex back-to-back configuration creates a wide, rigid support system that effectively resists moment loads and provides exceptional stiffness. With a 25° contact angle and heavy preload, this bearing pair delivers a high radial dynamic load rating of 8482 lbf and a radial static load rating of 6862 lbf, making it capable of handling severe combined loads.
Optimized High-Speed Performance: The use of a lightweight, durable phenolic cage minimizes centrifugal forces and friction, contributing to a high limiting speed of 100.5 x 1000 rpm. This design is ideal for high-speed spindles and other rapid rotation applications.
Precision and Reliability: Manufactured to P4A tolerance class from high-grade chrome steel for both rings and balls, this bearing guarantees minimal runout and consistent performance. The bearings are pre-lubricated and supplied as a matched set, ensuring immediate, reliable operation upon installation.
7206 ACD/P4ADBD Bearing Typical Application Areas
The 7206 ACD/P4ADBD is engineered for the most demanding precision applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring maximum rigidity and accuracy.
- Precision Gearboxes: Where low noise, high stiffness, and precise shaft positioning are critical.
- High-Frequency Motors and Spindles: Applications demanding stability at very high rotational speeds.
- Industrial Pumps and Compressors: For robust performance under significant radial and axial loads.
