7038 ACDGC/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7038 ACDGC/P4A Bearing Product Overview & Core Advantages
The 7038 ACDGC/P4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. As a single bearing from a universally matchable (SU) set of three, it is designed to accommodate combined loads, primarily high axial loads in one direction, thanks to its 25° contact angle. Its defining characteristics include a P4A tolerance class for superior running accuracy, a moderate preload (Class C) for enhanced system stiffness, and a phenolic cage optimized for high-speed performance. This bearing is the ideal choice for high-reliability, high-speed spindles and precision machinery.
7038 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7038 | Standard bore diameter (190 mm), outside diameter (290 mm), and width (46 mm) designation. | Defines the core bearing dimensions. |
| AC | Angular Contact design. | Optimized for combined radial and axial loads. |
| DGC | Duplex arrangement with back-to-back mounting and moderate preload (Class C). | Provides high rigidity and precise shaft positioning. |
| P4A | High-Precision Tolerance Class. | Exceeds ABEC 7 standards, ensuring minimal runout and vibration for precision applications. |
7038 ACDGC/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The 25° contact angle and moderate preload are key to this bearing's high axial rigidity and capacity to handle significant combined loads. The optimized internal geometry, including a ball diameter of 30.162 mm and 22 balls, provides a high dynamic load rating of 52,650 lbf and static load rating of 65,250 lbf.
Superior High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, reduces friction, and allows for a high limiting speed of 11,000 rpm. The open design and factory lubrication facilitate optimal cooling and minimal heat generation at high rotational speeds.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees exceptional running accuracy, low noise, and extended service life in the most demanding precision applications.
7038 ACDGC/P4A Bearing Typical Application Areas
The 7038 ACDGC/P4A is specifically designed for high-performance machinery where speed, precision, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring ultra-fine surface finishes.
- High-Frequency Motors and Spindles: Where minimal vibration is critical.
- Industrial Pumps and Compressors: For efficient and reliable operation under axial loads.
