7040 ACDGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7040 ACDGA/P4A Bearing Product Overview & Core Advantages
The 7040 ACDGA/P4A is a single row angular contact ball bearing engineered for applications demanding high precision and exceptional running accuracy. Designed to accommodate primarily axial loads in one direction, this bearing features a 25° contact angle for optimal load carrying capacity. Manufactured to the stringent P4A tolerance class, it guarantees superior dimensional and running accuracy, making it ideal for high-speed spindles and other precision machinery. Its phenolic cage and universal matching designation (SU) further enhance its performance in complex, preloaded arrangements.
7040 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7040 | Standard bore diameter (200 mm) and series designation. | Defines the core bearing dimensions. |
| AC | Angular Contact design. | Optimized for combined radial and axial loads. |
| DGA | Specific internal design and preload designation (Extra light / Class A). | Ensures low starting torque and minimal heat generation, suitable for high-speed applications. |
| P4A | Tolerance class exceeding ABEC 7 / ISO P4. | Guarantees extremely tight dimensional and running accuracy for superior performance in precision machinery. |
7040 ACDGA/P4A Bearing Structural Features & Performance Benefits
High-Precision Construction: Manufactured from high-grade chrome steel for both rings and balls, this bearing ensures long-term dimensional stability and wear resistance under demanding conditions. The tight tolerances on bore, outside diameter, and width contribute to predictable and precise system performance.
Optimized for High Speeds: The phenolic cage is a key feature, offering low weight, high strength, and excellent performance at the limiting speed of 16,250 rpm. It allows for smooth operation with reduced friction and centrifugal forces.
Superior Load Capacity: With a radial dynamic load rating of 63,225 lbf and a radial static load rating of 82,125 lbf, the 7040 ACDGA/P4A is built to handle significant loads. The 25° contact angle effectively manages axial loads while also supporting substantial radial loads.
Universal Matching (SU): This bearing is universally matchable, meaning individual bearings can be assembled in any combination (back-to-back, face-to-face, or tandem) to form a matched set (up to 4 bearings) with pre-established preload and rigidity, simplifying installation and optimizing system performance.
7040 ACDGA/P4A Bearing Typical Application Areas
The 7040 ACDGA/P4A is ideally suited for high-performance applications where precision, high speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, high-frequency motors.
- Industrial Pumps & Compressors: Where accurate shaft positioning is critical.
- Robotics and Automation: High-accuracy rotary joints and arms.
