7205 CD/P4AQBCC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7205 CD/P4AQBCC
Basic Information
System of measurement
Metric
Weight
0.51 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
60 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
8055 lbf
Radial static load rating
6525 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
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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7205 CD/P4AQBCC Bearing Product Overview & Core Advantages
The 7205 CD/P4AQBCC is a precision quadruplex matched set of angular contact ball bearings designed for applications requiring exceptional rigidity and accuracy. This metric system bearing features a moderate preload (Class C) and is configured in a back-to-back (QBC) arrangement, making it ideal for supporting combined radial and axial loads simultaneously. Manufactured to P4A tolerance class, it delivers high running accuracy and is pre-lubricated for immediate use in demanding, high-precision machinery.
7205 CD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7205 | Basic bearing series: Light duty, 25mm bore, 52mm OD. |
| CD | Contact angle of 15°. |
| P4A | High-Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards for superior running accuracy. |
| QBCC | Quadruplex (4 bearings) Back-to-Back Matched Set with Moderate Preload (Class C) applied. |
7205 CD/P4AQBCC Bearing Structural Features & Performance Benefits
- Exceptional Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates a highly rigid bearing system capable of handling significant combined loads and moment loads, ensuring precise shaft positioning and minimal deflection under operation.
- High-Speed Performance: The phenolic resin cage offers low weight and excellent performance at high speeds, contributing to a limiting speed of 100,500 rpm. The optimized internal geometry and 15° contact angle further enhance high-speed capability.
- Precision & Accuracy: Manufactured to a P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this set guarantees smooth, quiet, and vibration-free operation essential for precision applications.
- Optimized for Preload: The bearings are supplied as a pre-matched and preloaded set, simplifying installation and ensuring immediate optimal performance with controlled axial play and increased system stiffness.
7205 CD/P4AQBCC Bearing Typical Application Areas
This precision matched bearing set is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Gearboxes and Transmission Systems
- High-Frequency Motors and Spindles
- Medical and Dental Equipment Drives
- Aerospace Actuation Systems and Instrumentation
