7038 ACD/P4ATBTA
7000 Series Super Precision Angular Contact Ball Bearings
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7038 ACD/P4ATBTA Bearing Product Overview & Core Advantages
The 7038 ACD/P4ATBTA is a precision angular contact ball bearing supplied as a matched triplex set in a back-to-back (TBT) arrangement. Engineered to the exacting P4A tolerance class, this bearing is designed for applications demanding exceptional rotational accuracy, high system rigidity, and the ability to handle combined loads. Its extra light preload (Class A) ensures smooth, precise operation from startup, making it an ideal choice for high-performance spindles and other precision machinery.
7038 ACD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7038 | Standard bore diameter (190 mm) and series designation. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a matched bearing set. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| TB | Arrangement: Back-to-Back (TBT). |
| TA | Preload: Extra Light (Class A). |
7038 ACD/P4ATBTA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The triplex back-to-back arrangement creates a highly rigid bearing system capable of supporting significant combined radial and axial loads from both directions. This configuration provides excellent moment load resistance, crucial for maintaining accuracy under operational stresses.
Precision & High-Speed Performance: Manufactured to P4A tolerance and featuring a lightweight, durable phenolic cage, this bearing ensures smooth operation with minimal vibration. The optimized internal geometry and 25° contact angle contribute to stable high-speed performance, with a limiting speed of 11,000 rpm.
Optimized Internal Design: The bearing utilizes 22 high-precision chrome steel balls with a diameter of 30.162 mm, ensuring high dynamic load ratings (114,075 lbf dynamic, 198,000 lbf static). The open seal type allows for custom lubrication schemes to maximize performance in specific applications.
7038 ACD/P4ATBTA Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is ideally suited for demanding applications, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Motorized Spindles
- Aerospace & Defense Positioning Systems
- Other high-performance machinery requiring exceptional accuracy and rigidity.
