7002 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7002 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7002 CDGA/HCP4A is a single-row angular contact ball bearing designed for applications demanding ultra-high precision and exceptional performance. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and rotational stability. Its 15° contact angle is optimized to handle significant axial loads in one direction while supporting combined radial and axial loads. The combination of ceramic balls and phenolic cage enables outstanding high-speed capabilities up to 100,000 rpm, while the extra light preload (Class A) ensures minimal friction and precise shaft positioning. This bearing comes pre-lubricated and is universal matchable (SU), allowing for flexible mounting arrangements in precision assemblies.
7002 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 7002 | Basic bearing series with 15mm bore, 32mm OD | Compact design for space-constrained applications |
| CDGA | Contact angle 15°, phenolic cage, universal matchable | Optimized for high-speed operation and flexible mounting |
| HCP4A | Hybrid ceramic balls with P4A tolerance class | Enhanced speed capability and ultra-precise rotation |
Structural Features & Performance Advantages
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride ceramic balls significantly reduces centrifugal forces, enabling higher rotational speeds while providing excellent corrosion resistance and electrical insulation properties.
Precision Phenolic Cage: The phenolic resin cage offers superior strength-to-weight ratio, excellent dimensional stability at high temperatures, and reduced friction compared to metal cages, contributing to the bearing's exceptional high-speed performance.
Ultra-Precise Tolerance Class P4A: Manufactured to ABEC 7/P4A precision standards, this bearing ensures minimal runout and vibration, making it ideal for applications requiring extreme rotational accuracy and smooth operation.
Optimized Preload Configuration: The extra light preload (Class A) minimizes starting and running torque while maintaining precise axial positioning, reducing heat generation and power consumption during operation.
7002 CDGA/HCP4A Bearing Typical Application Areas
- High-Speed Machine Tool Spindles: CNC machining centers, grinding spindles, and precision milling applications
- Precision Medical Equipment: Dental handpieces, surgical tools, and laboratory instrumentation
- Aerospace Systems: Gyroscopes, navigation instruments, and aircraft control systems
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages, and inspection equipment
- High-Frequency Motors: Spindle motors, servo motors, and other high-RPM electric drives
