7220 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7220 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7220 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a single bearing with a 15° contact angle and Extra light preload (Class A), it delivers superior rotational accuracy and rigidity. Its construction with a phenolic cage and ceramic balls enables outstanding high-speed capabilities, with a limiting speed of 16,250 rpm. This bearing is Universal Matchable (SU), allowing for precise preload control when mounted in sets, making it ideal for high-precision spindles and other critical machinery.
7220 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7220 | Basic bearing designation (100mm bore, 180mm OD) |
| C | 15° contact angle design |
| DG | Universal matching bearing (can be mounted in any combination) |
| A | Extra light preload (Class A) |
| HC | Hybrid ceramic balls (silicon nitride) |
| P4A | High precision tolerance class (superior to ABEC 7) |
7220 CDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings with ceramic balls significantly reduces centrifugal forces, enabling higher operating speeds while providing excellent wear resistance and electrical insulation properties.
Precision Phenolic Cage: The phenolic resin cage offers superior strength-to-weight ratio, reduced friction, and excellent performance at high speeds, contributing to the bearing's 16,250 rpm limiting speed.
Enhanced Rigidity & Accuracy: With P4A tolerance class and extra light preload, this bearing maintains precise shaft positioning and minimizes deflection under load, ensuring consistent performance in precision applications.
Superior Load Capacity: Rated for 35,100 lbf dynamic and 30,825 lbf static radial loads, the bearing handles combined loads effectively while maintaining high precision.
7220 CDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Robotics - High-accuracy robotic arms and positioning systems
- Aerospace Systems - Guidance systems and flight control mechanisms
- Medical Equipment - Dental handpieces and surgical tools
- High-Speed Motors - Spindle motors and high-RPM drive systems
- Semiconductor Manufacturing - Wafer handling and processing equipment