S71902 CD/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71902 CD/HCP4ADT Bearing Product Overview & Core Advantages
The S71902 CD/HCP4ADT is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a duplex tandem (DT) matched set, this bearing configuration is engineered to handle significant axial loads in one direction while maintaining exceptional rotational accuracy. Its construction with a phenolic cage and ceramic balls enables superior limiting speeds and reduced operational friction, making it ideal for high-performance spindles and precision machinery requiring P4A tolerance class accuracy.
S71902 CD/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact bearings |
| 1902 | Bore size 15mm, Outside diameter 28mm, Width 14mm |
| CD | Duplex Tandem (DT) arrangement, preloaded |
| HC | Hybrid Ceramic construction (steel rings with ceramic balls) |
| P4A | Super precision tolerance class (equivalent to ABEC 7) |
S71902 CD/HCP4ADT Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls provides exceptional performance characteristics including reduced centrifugal forces, lower operating temperatures, and extended service life under high-speed conditions.
Duplex Tandem Preload: The matched set arrangement with factory-applied preload ensures optimal stiffness and rotational accuracy, eliminating the need for on-site adjustment and providing immediate peak performance upon installation.
High-Speed Phenolic Cage: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at limiting speeds up to 95,000 rpm, with superior lubrication retention and minimal friction.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore diameter, outside diameter, and width, ensuring consistent performance and interchangeability.
S71902 CD/HCP4ADT Bearing Typical Application Areas
The S71902 CD/HCP4ADT finds critical application in:
- High-Speed Machine Tool Spindles - CNC machining centers, grinding spindles
- Precision Medical Equipment - Dental handpieces, surgical tools
- Aerospace Systems - Gyroscopes, navigation instruments
- Semiconductor Manufacturing - Wafer handling robots, precision stages
- High-Frequency Motors - Spindle motors, high-RPM drives
