7208 CD/P4ADT
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7208 CD/P4ADT
Basic Information
System of measurement
Metric
Weight
0.75 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.004mm to 0
Width
36 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
12442 lbf
Radial static load rating
10800 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
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
Price available upon request.
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7208 CD/P4ADT Bearing Product Overview & Core Advantages
The 7208 CD/P4ADT is a precision angular contact ball bearing configured in a Duplex Tandem (DT) arrangement. This matched pair is designed for applications requiring exceptional high-speed performance and the capacity to handle significant axial loads in a single direction. Manufactured to the stringent P4A tolerance class, it delivers superior running accuracy and rotational stability, making it ideal for high-precision, high-reliability machinery where uncompromising performance is critical.
7208 CD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7208 | Basic bearing series, indicating a 40mm bore, 80mm OD, and 36mm width. |
| C | Specifies a 15° contact angle, optimized for high axial load capacity. |
| D | Indicates the bearing is part of a Duplex (matched pair) set. |
| P4A | Denotes a high-precision tolerance class with enhanced dimensional and running accuracy. |
| DT | Signifies the Duplex Tandem arrangement, where two bearings are mounted to increase axial load capacity in the same direction. |
7208 CD/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Load Capacity: The Duplex Tandem (DT) arrangement combines two bearings to create a highly rigid assembly capable of supporting very high axial loads in one direction. The 15° contact angle is specifically engineered for this purpose.
- Precision & High-Speed Operation: Manufactured to P4A tolerance class, this bearing ensures minimal vibration and precise shaft positioning. The lightweight phenolic cage contributes to lower centrifugal forces, enabling a high limiting speed of 41,000 rpm.
- Optimized Internal Geometry: With 14 precision balls of 11.112mm diameter, the bearing provides a high dynamic load rating of 12,442 lbf and smooth operation.
- Preload & Stability: The bearings are supplied with a preload, which eliminates internal clearance, increases system stiffness, and improves rotational accuracy.
7208 CD/P4ADT Bearing Typical Application Areas
This bearing is engineered for demanding applications in:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines and precision engraving equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM applications.
- Axial Load Dominant Systems: Pumps and compressors where thrust loads are primary.
