7208 CD/P4ADFA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7208 CD/P4ADFA
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 Face-to-Face (DF)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
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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7208 CD/P4ADFA Bearing Product Overview & Core Advantages
The 7208 CD/P4ADFA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex face-to-face (DF) matched set delivers superior performance under combined loads, handling both radial and axial forces simultaneously. Manufactured to the stringent P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed spindles and other precision machinery. The preloaded Extra light (Class A) configuration provides immediate axial stiffness and precise shaft positioning right from installation.
7208 CD/P4ADFA Bearing Model Code Explained, Specifications & Naming Convention
| 7208 | Basic series designation (40mm bore, 80mm OD) |
| CD | Duplex face-to-face (DF) arrangement with specific internal design for optimal preload |
| P4A | High-precision tolerance class exceeding ABEC 7 standards, with enhanced running accuracy requirements |
| DFA | Specific internal design and preload specification for the matched set |
7208 CD/P4ADFA Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The duplex face-to-face (DF) matched pair is preloaded to eliminate axial play, providing immediate high rigidity and exceptional running accuracy for precise shaft guidance.
- Superior Load Capacity: The 15° contact angle and optimized internal geometry enable efficient handling of combined radial and axial loads in both directions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components contribute to a high limiting speed of 41,000 rpm.
- Enhanced Durability: Manufactured from high-grade chrome steel for both rings and balls, ensuring long service life and consistent performance under demanding conditions.
7208 CD/P4ADFA Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision and speed are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Gearboxes: Industrial robotics and automation systems
- High-Frequency Motors: Spindles for PCB drilling and routing
- Medical Equipment: Dental handpieces and laboratory centrifuges
- Aerospace Systems: Guidance systems and auxiliary power units
