7040 CD/P4ADGB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7040 CD/P4ADGB
Basic Information
System of measurement
Metric
Weight
24.6 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
200 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
310 mm
Outside diameter tolerance
-0.004mm to 0
Width
102 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
34.925 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
109800 lbf
Radial static load rating
172125 lbf
Limiting speed
16.25 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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7040 CD/P4ADGB Bearing Product Overview & Core Advantages
The 7040 CD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4A tolerance class, it offers superior dimensional and running accuracy. Its universal matchable (SU) design allows for flexible mounting in various preload configurations, simplifying installation and ensuring optimal performance. This bearing is pre-lubricated and features a light preload (Class B), making it ideal for high-speed spindles and other precision machinery where high rigidity and minimal runout are critical.
7040 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| CD | Indicates a 15° contact angle and that the bearing is supplied as a universally matchable (SU) set. This allows for flexible mounting in back-to-back (DB), face-to-face (DF), or tandem (DT) arrangements. |
| P4A | Denotes an ABEC 7 / ISO P4 tolerance class with additional running accuracy requirements, ensuring extremely low vibration and high-precision performance. |
| DGB | Signifies a duplex pair of bearings with a light preload (Class B). This configuration provides enhanced system rigidity and precise shaft positioning. |
7040 CD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex pair (DGB) configuration and 15° contact angle provide superior resistance to combined loads (radial and axial), ensuring stable operation under demanding conditions.
- Precision Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing guarantees exceptional running accuracy, low noise, and low vibration, which is critical for high-speed applications.
- Optimized for High Speeds: The combination of the lightweight phenolic cage, precision-ground chrome steel components, and optimized internal geometry allows for a high limiting speed of 16,250 rpm.
- Universal Matching & Ease of Installation: The Universal Matchable (SU) designation means the supplied pair can be mounted in various configurations to achieve the required preload and stiffness without selective assembly.
7040 CD/P4ADGB Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
- Industrial Robotics and Automation Equipment
