S7203 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7203 CDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.056 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
12 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
2077 lbf
Radial static load rating
934 lbf
Limiting speed
85 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S7203 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S7203 CDGA/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. As a single bearing with a 15° contact angle and Extra Light (Class A) preload, it is optimized to handle combined loads—simultaneously supporting significant radial loads and axial loads in one direction. Its construction with ceramic balls and a phenolic cage contributes to superior high-speed performance, low heat generation, and extended service life. This bearing is a premier choice for high-rigidity, high-rotation accuracy systems.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 203 | Standard bore (17 mm) and outside diameter (40 mm) size code. |
| CDGA | Contact angle of 15° and Extra Light (Class A) preload. |
| HCP4A | Indicates a Universal Matchable (SU) bearing with P4A tolerance class for extreme dimensional and running accuracy. |
S7203 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The P4A super-precision tolerance and controlled preload ensure minimal shaft runout and exceptional system stiffness, which is critical for maintaining accuracy under load.
- Superior High-Speed Capability: The combination of a lightweight phenolic resin cage and low-density ceramic balls reduces centrifugal forces, enabling a high limiting speed of 85,000 rpm.
- Enhanced Load Capacity: The 15° contact angle design provides an optimal balance, offering robust radial dynamic load rating (2077 lbf) and reliable axial load capacity.
- Reduced Maintenance & Long Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is ready for long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S7203 CDGA/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery and systems, including:
- Machine Tool Spindles for CNC milling and grinding machines
- High-frequency Spindles in PCB drilling and routing equipment
- Precision Robotic Arms and joints
- High-speed Medical and Dental Handpieces
- Aerospace instrumentation and control systems
