7208 CD/P4ADGD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7208 CD/P4ADGD
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
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Heavy / Class D
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/P4ADGD Bearing Product Overview & Core Advantages
The 7208 CD/P4ADGD is a precision angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. As a universal matchable (SU) bearing supplied in a preloaded pair, it delivers superior performance under combined loads. Its P4A tolerance class ensures ultra-precision operation, while the heavy preload (Class D) provides maximum system stiffness, making it ideal for high-speed, high-rigidity spindles and precision machinery.
7208 CD/P4ADGD Bearing Model Code Explained, Specifications & Naming Convention
The model number 7208 CD/P4ADGD is decoded as follows:
- 7208: Basic series designation for a 40mm bore, 80mm OD angular contact ball bearing.
- C: Denotes a 15° contact angle, optimized for high-speed applications and moderate axial loads.
- D: Indicates the bearing is supplied with a Heavy Preload (Class D) for maximum rigidity.
- P4A: Specifies an ultra-precision tolerance class exceeding ABEC 7/ISO P4, with enhanced running accuracy requirements.
- DGD: Signifies that the bearing is part of a Universal Matchable (SU) pair ("Duplex, Ground Spacers"), supplied as a pre-configured set ready for installation in a universal (face-to-face or back-to-back) arrangement.
7208 CD/P4ADGD Bearing Structural Features & Performance Benefits
- High Rigidity & System Stability: The duplex pair with a heavy preload eliminates internal clearance, creating an exceptionally stiff bearing system that minimizes deflection under load.
- Superior Load Capacity: The angular contact design efficiently handles combined radial and axial loads simultaneously. The universal matchable feature allows for flexible mounting configurations to accommodate complex load conditions.
- High-Speed Performance: The lightweight phenolic cage and optimized 15° contact angle reduce centrifugal forces and friction, enabling a high limiting speed of 41,000 rpm.
- Precision & Accuracy: Manufactured to P4A tolerance class with strict dimensional and running accuracy, this bearing ensures smooth, quiet, and vibration-free operation critical for precision applications.
- Durable Construction: Made from chrome steel for both rings and balls, it offers high fatigue life and wear resistance.
7208 CD/P4ADGD Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Rotary Systems: Industrial robots, rotary tables, and indexing heads.
- High-Frequency Motors: Spindles for PCB drilling and high-speed electric motors.
- Medical Equipment: Dental handpieces and advanced imaging devices.
- Aerospace & Defense: Gyroscopes, radar systems, and other precision guidance mechanisms.
