7202 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7202 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The 7202 CD/HCP4ADBA is a duplex back-to-back angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. This P4A super-precision bearing features a 15° contact angle and is preloaded for extra light operation, making it ideal for machine tool spindles and other high-speed equipment. Its ceramic balls and phenolic cage contribute to superior high-speed performance with a limiting speed of 95,000 rpm, while the duplex DB arrangement provides excellent stability under combined radial and axial loads.
7202 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 7202 | Basic bearing series with 15mm bore, 35mm OD | Standard dimension compatibility |
| CD | Duplex arrangement in back-to-back configuration | Enhanced moment rigidity and load distribution |
| HC | Hybrid ceramic balls (silicon nitride) | Higher speed capability, reduced friction, longer service life |
| P4A | ABEC 7 / ISO P4A super precision tolerance class | Exceptional running accuracy for demanding applications |
| DB | Duplex back-to-back mounting (pre-assembled pair) | Optimized preload for immediate installation and performance |
| A | Extra light preload classification | Minimal friction, ideal for very high-speed operation |
7202 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
Enhanced Rigidity & Load Capacity: The duplex back-to-back arrangement creates a rigid bearing system that effectively resists moment loads and provides stable support for combined radial and axial loads. With a dynamic load rating of 2722 lbf and static load rating of 1474 lbf, this bearing delivers reliable performance in demanding applications.
Superior High-Speed Performance: The combination of ceramic balls (lower density than steel) and phenolic resin cage enables exceptional high-speed capability up to 95,000 rpm. The hybrid construction reduces centrifugal forces, minimizes friction, and maintains dimensional stability at elevated temperatures.
Precision Engineering: Manufactured to P4A super-precision tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, this bearing ensures minimal runout and vibration for applications requiring the highest levels of rotational accuracy.
Optimized Thermal Performance: The 15° contact angle and extra light preload configuration minimize heat generation during high-speed operation, while the phenolic cage provides excellent thermal stability across the operating temperature range of -30°C to 110°C.
7202 CD/HCP4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision milling applications
- High-Speed Motors: Servo motors, spindle motors, and other precision electric motors
- Medical Equipment: Dental handpieces, surgical tools, and laboratory instrumentation
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages
- Test & Measurement Equipment: Coordinate measuring machines, optical inspection systems
