7222 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7222 CD/HCP4A Bearing Product Overview & Core Advantages
The 7222 CD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional speed performance. Its defining characteristic is the 15° contact angle and P4 (ABEC-7) tolerance class, ensuring minimal runout and superior rotational accuracy. The combination of a ceramic ball and phenolic cage enables significantly higher limiting speeds and reduced friction, making it ideal for high-speed spindles and other precision machinery where thermal stability and reliability are critical.
7222 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 7222 | Basic bearing series and size designation (110mm Bore, 200mm OD, 38mm Width). | Defines the core bearing dimensions. |
| CD | A 15° contact angle and optimized internal geometry for high-speed operation. | Provides superior axial load capacity and high-speed stability. |
| HC | Hybrid Ceramic: Features ceramic balls (typically Silicon Nitride, Si3N4). | Reduces centrifugal forces, lowers operating temperature, and extends service life, especially at high speeds. |
| P4A | Specifies a P4 (ABEC-7) tolerance class with specific accuracy requirements for the shaft and housing seat. | Guarantees ultra-precise running accuracy and system performance. |
7222 CD/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls within a chrome steel ring structure drastically reduces weight and inertia, allowing for higher acceleration rates and a limiting speed of 13,000 rpm. Ceramic's inherent properties also provide superior resistance to wear and thermal degradation.
Phenolic Resin Cage: The lightweight and robust phenolic cage is ideal for high-speed applications. It offers excellent dimensional stability under centrifugal forces and operates effectively within the specified temperature range (-30° to 110 °C).
High-Precision & Preload: Manufactured to P4 tolerance, this bearing ensures minimal vibration and precise shaft positioning. The design is suitable for preload applications, which increases system rigidity and further enhances rotational accuracy.
Load Capacity: With a dynamic load rating of 40,050 lbf and a static load rating of 37,350 lbf, it is capable of handling significant combined radial and axial loads simultaneously.
7222 CD/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Motors and generators operating at very high rotational speeds.
- Aerospace & Defense: Gyroscopes, radar systems, and other critical high-speed mechanisms.
