7205 CDGC/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7205 CDGC/P4A
Basic Information
System of measurement
Metric
Weight
0.13 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
15 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
3038 lbf
Radial static load rating
1620 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7205 CDGC/P4A Bearing Product Overview & Core Advantages
The 7205 CDGC/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring superior rotational accuracy and rigidity. Positioned in the P4A tolerance class, it delivers exceptional dimensional and running accuracy. Its 15° contact angle is optimized to support significant combined loads (radial and axial loads simultaneously). The phenolic cage and universal matching (SU) designation enable high-speed operation and simplified preload configuration in multi-bearing arrangements, making it ideal for machine tool spindles and other demanding precision machinery.
7205 CDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7205 | Basic bearing series designation, indicating a medium-duty angular contact bearing with a 25mm bore, 52mm OD, and 15mm width. |
| C | Denotes a 15° contact angle, optimized for high-speed applications and moderate axial load capacity. |
| DG | Indicates a universal matchable bearing (Universal Matchable SU). Two bearings can be paired in a back-to-back (DB) or face-to-face (DF) arrangement to support axial loads in both directions. |
| C | Specifies a Moderate preload / Class C. This internal preload enhances system rigidity and reduces deflection under operational loads. |
| P4A | Signifies an ABEC 7 / ISO P4 precision class with additional running accuracy requirements. This ensures minimal vibration and superior performance in high-speed spindles. |
7205 CDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The single-row design with a 15° contact angle provides excellent resistance to combined loads. The Moderate (C) preload significantly increases system stiffness, minimizing axial and radial play under operation.
- Superior High-Speed Performance: The lightweight phenolic resin cage ensures stability and reduced centrifugal forces at the limiting speed of 100,500 rpm. The optimized internal geometry minimizes friction and heat generation.
- Precision Engineering: Manufactured to P4A tolerance class, this bearing guarantees tight dimensional control (bore and OD tolerance: -0.004mm to 0) for precise shaft positioning and smooth, quiet running.
- Universal Matching Capability (SU): As a universal matchable bearing, it can be universally paired with another identical bearing without selective matching, simplifying inventory and assembly for duplex sets to handle bidirectional axial loads.
7205 CDGC/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for applications demanding high speed, rigidity, and accuracy, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, precision grinders.
- High-Frequency Motors: Spindles for routers and high-speed electric motors.
- Medical Equipment: Dental handpieces, centrifuges.
- Robotics: High-precision robotic arm joints and gears.
