S7203 CD/P4ADGB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7203 CD/P4ADGB
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4A
Seal type
Sealed
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
85 X 1000 rpm
Lubrication
Grease
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
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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S7203 CD/P4ADGB Bearing Product Overview & Core Advantages
The S7203 CD/P4ADGB is a precision double row angular contact ball bearing designed for applications requiring exceptional accuracy and rigidity. Engineered to the P4A tolerance class, it delivers superior running precision. Its fundamental advantage lies in its ability to simultaneously support substantial combined loads—both radial and bidirectional axial loads—within a compact design envelope. The light preload (Class B) minimizes deflection under operational stresses, ensuring high system stiffness and rotational accuracy. This makes it an ideal choice for high-performance, high-reliability machinery.
S7203 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Specifies a 15° contact angle and a specific internal design optimized for high rigidity and precise operation. |
| P4A | Denotes an ultra-precision tolerance class with enhanced dimensional and running accuracy requirements beyond standard P4. |
| DGB | Indicates the bearing is universally matchable (SU). Two bearings can be paired in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to achieve the required system rigidity and load capacity. |
S7203 CD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design and light preload provide exceptional resistance to deflection under complex combined loads, ensuring stable and precise shaft positioning.
- Precision Performance: Manufactured to P4A tolerance class with a 15° contact angle, this bearing guarantees minimal runout and vibration, which is critical for high-speed and high-precision applications.
- Optimized High-Speed Operation: The phenolic resin cage offers low weight and excellent sliding properties, contributing to lower friction and higher limiting speeds (up to 85,000 rpm with grease lubrication).
- Maintenance-Free & Long Service Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is ready for immediate installation, offering a long, maintenance-free service interval within its specified temperature range.
S7203 CD/P4ADGB Bearing Typical Application Areas
This bearing is engineered for demanding applications where precision and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in robotics and high-performance automotive transmissions.
- High-Frequency Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
- Medical Equipment: Centrifuges and high-speed dental handpieces.
- Industrial Pumps & Compressors: Where accurate shaft control under combined loads is required.
