7048 ACD/P4ADGB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7048 ACD/P4ADGB
Basic Information
System of measurement
Metric
Weight
34.2 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
240 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
360 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
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
118575 lbf
Radial static load rating
209250 lbf
Limiting speed
7.5 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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7048 ACD/P4ADGB Bearing Product Overview & Core Advantages
The 7048 ACD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-set pair, it is engineered to accommodate combined loads—significant radial and axial loads from both directions simultaneously. Its P4A tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-speed spindles and other critical machinery where high rigidity and operational reliability are paramount.
7048 ACD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Designates a 25° contact angle and specific internal geometry optimized for high axial load capacity and speed. |
| P4A | Indicates a super-precision tolerance class with very tight limits on bore, outside diameter, and width, ensuring minimal runout and vibration. |
| DGB | Signifies a Universal Matchable (SU) bearing pair. Two bearings are supplied as a matched set with pre-determined axial clearance or preload when mounted face-to-face or back-to-back. |
7048 ACD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design and 25° contact angle provide superior rigidity, enabling the bearing to handle heavy combined radial and axial loads in both directions. The universal matchable pairing ensures optimal load distribution and system stiffness.
- Precision & High-Speed Performance: Manufactured to P4A tolerance standards with a phenolic cage, this bearing offers exceptional running accuracy and stability. The lightweight cage and optimized internal geometry contribute to a high limiting speed of 7,500 rpm, suitable for demanding high-speed applications.
- Durability & Reliability: Constructed from chrome steel for both rings and balls, the bearing provides excellent wear resistance and fatigue life. The open seal type allows for customized lubrication schemes to maximize performance in specific operating conditions.
7048 ACD/P4ADGB Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery where accuracy, speed, and rigidity are critical. Key applications include:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Frequency Motors and Precision Gearboxes
- Industrial Pumps and Compressors
- Aerospace Positioning Systems and Robotic Arms
