7203 CD/P4ADBD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7203 CD/P4ADBD
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
17 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
40 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
10
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3398 lbf
Radial static load rating
1868 lbf
Limiting speed
103 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
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7203 CD/P4ADBD Bearing Product Overview & Core Advantages
The 7203 CD/P4ADBD is a precision duplex angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This metric system bearing features a back-to-back (DB) matched arrangement with a Heavy (Class D) preload, making it ideal for handling combined radial and axial loads simultaneously. Manufactured to P4A tolerance class, it delivers superior running accuracy and rotational precision, perfect for high-speed, high-rigidity spindles and precision machinery where uncompromising performance is critical.
7203 CD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| C | Specifies a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Indicates the bearing is part of a duplex pair (two bearings supplied as a set). |
| P4A | Denotes a high precision tolerance class, exceeding standard ABEC-7/ISO P4 specifications for enhanced running accuracy. |
| DB | Specifies the back-to-back mounting arrangement of the duplex pair, providing high moment rigidity. |
7203 CD/P4ADBD Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The back-to-back (DB) duplex design creates a wide effective spread, significantly increasing system rigidity and stability against moment loads, which is crucial for precision machining.
- Superior Load Capacity: Engineered with a 15° contact angle and heavy preload, this bearing excels at handling combined loads, offering robust support for both radial and substantial axial forces in both directions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction, contributing to the high limiting speed of 103,000 rpm. The open design facilitates efficient lubrication management.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore diameter, outside diameter, and width, this bearing guarantees minimal runout and superior rotational accuracy.
7203 CD/P4ADBD Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Rotary Systems: High-accuracy indexing tables, rotary encoders, and measuring instruments.
- High-Frequency Motors & Spindles: Applications requiring high rotational speeds and stiffness.
