7213 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Product Overview and Core Advantages
The 7213 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single bearing features a 15° contact angle and is manufactured to P4A tolerance class, ensuring ultra-precise rotational characteristics. Its core advantages include superior high-speed capability with a limiting speed of 32,500 rpm, enabled by its phenolic cage and ceramic balls, and the ability to handle combined loads efficiently. The bearing is universally matchable (SU), allowing for flexible arrangement in sets to achieve specific preload and rigidity requirements.
7213 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Suffix | Technical Meaning |
|---|---|
| CDGA | Indicates a universally matchable bearing designed with a specific internal geometry. When mounted with a similar bearing, it produces a defined preload (Extra light / Class A). |
| HCP4A | Signifies the tolerance class P4A, which denotes very high running accuracy. The "HC" prefix may refer to the use of Hybrid Ceramic components (ceramic balls with steel rings). |
Structural Features and Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and wear, enabling higher speeds and longer service life. It also provides non-conductive properties and superior performance in lubricant-starved conditions.
- Phenolic Resin Cage: This lightweight and robust cage material is ideal for high-speed applications, offering excellent dimensional stability and low friction at high rotational velocities.
- High-Precision P4A Tolerance: Manufactured to the strictest dimensional and running accuracy standards, ensuring minimal vibration and precise shaft positioning, which is critical for precision machinery.
- Optimized for Combined Loads: The 15° contact angle is engineered to support significant radial loads while also handling thrust loads in one direction efficiently.
- Universal Matchability (SU): Allows for simplified mounting of multiple bearings in sets (back-to-back, face-to-face, or tandem) to achieve desired system rigidity and preload without selective matching.
7213 CDGA/HCP4A Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for applications where rotational accuracy and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy actuators.
- Aerospace Systems: Gyroscopes, auxiliary power units, and flight control mechanisms.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and other small, high-RPM motors.
