7205 CD/P4ADFG27
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7205 CD/P4ADFG27
Basic Information
System of measurement
Metric
Weight
0.26 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
52 mm
Outside diameter tolerance
-0.004mm to 0
Width
30 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4972 lbf
Radial static load rating
3285 lbf
Limiting speed
100.5 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
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.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7205 CD/P4ADFG27 Bearing Product Overview & Core Advantages
The 7205 CD/P4ADFG27 is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. This metric system bearing features a Face-to-Face (DF) matched arrangement, enabling it to handle combined loads—significant radial loads and bidirectional axial loads—simultaneously. Its P4A tolerance class ensures ultra-precise running accuracy, making it ideal for high-speed spindles and other high-rigidity, high-reliability machinery. The preloaded duplex set eliminates internal clearance, providing immediate and precise shaft positioning for superior performance.
7205 CD/P4ADFG27 Bearing Model Code Explained, Specifications & Naming Convention
The model number 7205 CD/P4ADFG27 provides a complete technical description:
- 7205: Basic series code for a 25mm bore, 52mm OD angular contact ball bearing.
- C: Denotes a 15° contact angle, optimized for high-speed operation.
- D: Indicates a Duplex (paired) bearing set.
- P4A: Specifies a super-precision tolerance class exceeding ABEC 7 standards.
- DF: Defines the Duplex Face-to-Face mounting arrangement.
- G2: Specifies a specific preload level within the matched set.
- 7: Indicates a phenolic resin cage, suitable for high-speed applications.
7205 CD/P4ADFG27 Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Stiffness: The Face-to-Face (DF) duplex arrangement creates a rigid bearing system that effectively resists overturning moments and provides exceptional axial and radial support, crucial for machine tool spindles.
- Superior Load Capacity: The angular contact design and duplex pairing allow the bearing to support substantial combined radial and axial loads from both directions.
- Optimized High-Speed Performance: The lightweight phenolic cage (designated by suffix 7) reduces centrifugal forces, while the 15° contact angle minimizes heat generation, enabling stable operation at the high limiting speed of 100,500 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, ensuring minimal runout and vibration for ultra-precise applications.
7205 CD/P4ADFG27 Bearing Typical Application Areas
This high-precision duplex bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motors: Spindles for PCB drilling and routing.
- Medical Equipment: High-speed rotors in dental handpieces and centrifuges.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
