7210 ACDGC/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7210 ACDGC/P4A Bearing Product Overview & Core Advantages
The 7210 ACDGC/P4A is a high-precision single row angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 25° contact angle and Moderate Preload (Class C), making it ideal for high-speed spindles and precision machinery. Its P4A tolerance class ensures superior dimensional and running accuracy, while the phenolic cage contributes to smooth operation at high rotational speeds. This bearing is universally matchable (SU designation), allowing for flexible mounting arrangements in duplex sets to achieve specific preload and stiffness requirements.
7210 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7210 | Basic bearing series; 50 mm bore, 90 mm OD, 20 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| DGC | Designates a universally matchable (SU) bearing, allowing for any combination (DB, DF, DT) when mounted in pairs or sets. |
| P4A | High-Precision Tolerance Class, providing extremely tight dimensional and running accuracy for demanding applications. |
7210 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and moderate preload (Class C) provide excellent resistance to deflection under combined radial and axial loads, ensuring stable operation and positioning accuracy.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling smooth operation up to the limiting speed of 46,000 rpm. The open design facilitates efficient lubrication and heat dissipation.
- Precision Engineering: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications like machine tool spindles.
- Universal Matching Capability (SU): As a universally matchable bearing, it offers maximum flexibility. Multiple bearings can be paired in various configurations (face-to-face, back-to-back, or tandem) to achieve the desired system rigidity and preload without selective matching.
7210 ACDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors and Robotic Drives.
- Medical Equipment and Aerospace Instrumentation.
