7209 ACDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7209 ACDGA/P4A Bearing Product Overview & Core Advantages
The 7209 ACDGA/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior running accuracy. Operating under the stringent P4A tolerance class, it is designed to handle significant combined loads (simultaneous radial and axial loads) efficiently. Its 25° contact angle optimizes axial load capacity while maintaining excellent high-speed capabilities. The bearing comes pre-lubricated and features a lightweight phenolic cage, contributing to its high limiting speed of 41,000 rpm. This combination of precision, speed, and load capacity makes it ideal for high-performance, high-reliability spindle and rotary applications.
7209 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7209 | Basic bearing series; 45 mm bore, 85 mm OD, 19 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| DGA | Universal Matchable (SU) bearing, supplied in a set of 3 for duplex mounting (e.g., DB, DF, DT). |
| P4A | High precision tolerance class with enhanced dimensional and running accuracy specifications. |
7209 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4A tolerance class with tight dimensional tolerances on bore, OD, and width, ensuring precise shaft positioning and minimal runout for superior system rigidity.
- Optimized Load Capacity: The 25° contact angle is engineered to support high combined loads, providing a robust solution for applications with significant axial and radial force components.
- Superior High-Speed Performance: The lightweight, high-strength phenolic cage minimizes centrifugal forces, while the optimized internal geometry and pre-lubrication enable a high limiting speed of 41,000 rpm.
- Universal Matching Design (DGA): As a Universal Matchable bearing supplied in a set, it allows for flexible preload and stiffness configurations (back-to-back, face-to-face, or tandem) without selective mounting, simplifying installation and enhancing application versatility.
7209 ACDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Rotary Tables
- Aerospace & Defense Actuators and Control Systems
- Medical Equipment (e.g., high-speed dental handpieces, imaging scanners)
