S7203 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7203 CD/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.11 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
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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S7203 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The S7203 CD/HCP4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. This back-to-back (DB) matched set features a P4A super-precision tolerance and is preloaded to class A (extra light), ensuring minimal runout and high system stability. Its construction with ceramic balls and a phenolic cage enables superior high-speed performance, reaching limiting speeds of 85,000 rpm. This bearing is engineered to handle combined loads (radial and axial) simultaneously, making it ideal for high-reliability, high-precision machinery.
S7203 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| 7203 | Basic bearing series and size designation (17mm bore, 40mm OD). | Defines the standard bearing dimensions. |
| C | 15° contact angle. | Optimized for handling axial loads and providing high-speed capability. |
| D | Duplex (Two bearings in a set). | Enables preloading for enhanced system rigidity and accuracy. |
| HC | Hybrid Ceramic (Ceramic balls with steel rings). | Reduced weight, lower friction, and extended service life, especially at high speeds. |
| P4A | Super Precision Tolerance Class. | Guarantees extremely tight dimensional and running accuracy for critical applications. |
| A | Specific internal design and preload (Extra Light / Class A). | Minimizes deflection and heat generation under high-speed operation. |
| DB | Back-to-Back mounting arrangement. | Provides high moment rigidity and can accommodate axial loads in both directions. |
S7203 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Accuracy: The duplex back-to-back (DB) arrangement and Class A preload create an exceptionally stiff bearing system that resists operational deflection, maintaining precision under load.
- Superior High-Speed Performance: The combination of hybrid ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage significantly lowers friction and allows for the high limiting speed of 85,000 rpm.
- Enhanced Load Capacity: The 15° contact angle and duplex design enable the bearing to efficiently support significant combined radial and axial loads.
- Sealed & Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is typically maintenance-free within its specified temperature range of -30°C to 110°C.
S7203 CD/HCP4ADBA Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotics (Articulated arm joints, rotary actuators)
- High-Frequency Motors and Spindle Drives
- Medical & Dental Equipment (High-speed handpieces, scanners)
- Aerospace Instrumentation and Gyroscopes
