7030 ACDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7030 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7030 ACDGB/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance under combined loads. Its defining characteristic is a 25° contact angle, optimized to support significant axial loads in one direction while accommodating substantial radial loads. Manufactured to the exacting P4A tolerance class, this bearing ensures exceptional running accuracy and rotational stability. The Universal Matchable (SU) designation allows for precise preload control when mounted in pairs, making it an ideal solution for high-rigidity spindles and other precision machinery where minimal deflection is critical.
7030 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 7030 | Standard bore diameter (150 mm) and outside diameter (225 mm) designation. |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Duplex arrangement, Ground back-to-back (Universal Matchable - SU). |
| P4A | High-Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards for superior running accuracy. |
7030 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction enable the bearing to handle high combined loads (radial and axial). When used in a back-to-back duplex pair (DGB), the arrangement provides exceptional moment stiffness, significantly increasing system rigidity.
- Precision & High-Speed Performance: The P4A tolerance class ensures minimal runout and vibration. The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 11,000 rpm, making it suitable for high-speed applications.
- Optimized Internal Geometry: Precision-ground chrome steel rings and balls, along with a controlled ball count (22) and diameter (23.812 mm), ensure consistent performance, low heat generation, and long service life.
- Universal Matching (SU): This feature allows for simplified mounting and precise preload setting (Light / Class B) when bearings are paired, eliminating complex selection and adjustment procedures.
7030 ACDGB/P4A Bearing Typical Application Areas
The 7030 ACDGB/P4A is designed for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Industrial robots and high-torque transmission systems.
- High-Frequency Motors: Spindles for PCB drilling and other precision machining.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and other critical positioning equipment.
