7002 CD/HCP4ADBG0.5
Hybrid Ceramic Super Precision Bearings
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Basic Information
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Ball & Washer Dimensions
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7002 CD/HCP4ADBG0.5 Bearing Product Overview & Core Advantages
The 7002 CD/HCP4ADBG0.5 is a duplex pair of angular contact ball bearings designed for high-precision and high-speed applications. This matched set in a back-to-back (DB) arrangement is preloaded to deliver exceptional system rigidity and precise running accuracy. The use of ceramic balls and a phenolic cage significantly enhances its performance under high rotational speeds and demanding conditions, making it an ideal solution for machine tool spindles and other precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7002 | Basic bearing series and size designation (15mm bore, 32mm OD) |
| C | 15° contact angle design |
| D | Duplex pair configuration |
| HC | Hybrid Ceramic construction (steel rings with ceramic balls) |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
| DB | Back-to-Back mounting arrangement |
| G0.5 | Specific preload level for optimal rigidity |
7002 CD/HCP4ADBG0.5 Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The combination of chrome steel rings with silicon nitride (Si3N4) ceramic balls provides superior performance characteristics including reduced friction, lower operating temperatures, and extended service life under high-speed conditions.
Enhanced Rigidity: The duplex back-to-back arrangement with factory-applied preload creates a highly rigid bearing system capable of withstanding combined loads (radial and axial) in both directions, ensuring precise shaft positioning and minimal deflection.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at the limiting speed of 95,000 rpm, while the ceramic balls reduce centrifugal forces and prevent skidding.
Precision Performance: Manufactured to P4A tolerance class, these bearings deliver exceptional running accuracy and minimal vibration, essential for high-precision spindle applications.
7002 CD/HCP4ADBG0.5 Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and drilling spindles requiring extreme precision and rigidity
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Spindle motors, dental handpieces, and small precision motors
- Robotics: Precision joints and high-accuracy positioning systems
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
