7044 ACD/P4ADGB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7044 ACD/P4ADGB
Basic Information
System of measurement
Metric
Weight
32.1 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
220 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
340 mm
Outside diameter tolerance
-0.004mm to 0
Width
112 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
38.1 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
117000 lbf
Radial static load rating
198000 lbf
Limiting speed
6.3 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7044 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 7044 ACD/P4ADGB is a precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. Operating under the stringent P4A tolerance class, this bearing is designed to simultaneously handle combined loads—significant radial loads and axial loads in one direction. Its universal matchable (SU) design allows two bearings to be paired in a back-to-back or face-to-face arrangement, simplifying assembly and enabling precise control over preload and system rigidity. With a light preload (Class B) and a 25° contact angle, it delivers outstanding performance for high-speed operation and high-precision positioning systems.
7044 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | Angular Contact Design with a 25° contact angle. | Optimized for carrying combined radial and axial loads efficiently. |
| P4A | High precision tolerance class exceeding ABEC 7/ISO P4. | Ensures minimal runout and superior rotational accuracy for critical applications. |
| DGB | Universal Matchable (SU) bearing pair with a light preload (Class B). | Enables simplified mounting and optimal system stiffness without additional adjustment. |
7044 ACD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The single-row design, combined with a 25° contact angle and phenolic cage, provides robust support. It offers a high dynamic load rating of 117,000 lbf and a static load rating of 198,000 lbf, making it suitable for applications with significant combined loads.
- High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 6,300 rpm, reducing centrifugal forces and operational temperatures.
- Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional controls on the bore diameter (220 mm), outside diameter (340 mm), and width (112 mm), ensuring consistent performance and ease of integration into precision assemblies.
- Optimized Internal Geometry: Featuring 21 high-grade chrome steel balls with a diameter of 38.1 mm, the bearing is designed for smooth operation and long service life under high-speed and high-load conditions.
7044 ACD/P4ADGB Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance machinery and systems, including:
- Machine Tool Spindles: Provides high rigidity and accuracy for milling, grinding, and turning centers.
- High-Speed Industrial Pumps & Compressors: Handles combined loads and high rotational speeds reliably.
- Precision Gearboxes and Robotics: Ensures precise motion control and positioning in automated systems.
- Aerospace Actuation Systems: Meets the demands for reliability and performance in critical flight control components.
