S7204 CD/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
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S7204 CD/HCP4A Bearing Product Overview & Core Advantages
The S7204 CD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed performance. Its defining characteristic is the 15° contact angle and ceramic ball construction, which enables it to support significant combined loads (radial and axial) simultaneously. Manufactured to a P4 (ABEC-7) tolerance class, this bearing offers exceptional running accuracy, making it ideal for high-reliability machinery where rotational precision is critical. The combination of a phenolic cage and preloaded design ensures smooth operation at the specified limiting speed while maintaining dimensional stability.
S7204 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning | Benefit |
|---|---|---|
| S7 | Series designation for high-precision angular contact bearings | Indicates a product line optimized for precision and speed. |
| 204 | Standard bore (20 mm) and dimension series code | Defines the bearing dimensions for interchangeability. |
| CD | Contact angle designation (15°) and high rigidity design | Optimized for combined loads and provides high rigidity. |
| HC | Hybrid Ceramic construction (steel rings, ceramic balls) | Reduces weight and friction, enhancing high-speed performance and longevity. |
| P4A | Tolerance class P4 (ABEC-7) with specific running accuracy | Guarantees exceptional precision and low vibration for demanding applications. |
S7204 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls with steel rings significantly reduces centrifugal forces, lowers operating temperature, and minimizes wear. This directly contributes to a higher limiting speed (43,000 rpm) and extended service life compared to all-steel counterparts.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability at high speeds and is well-suited for the demanding conditions of high-speed applications.
- Preloaded & Sealed: The bearing is supplied with a preload and is sealed, making it a ready-to-install, matched unit. This simplifies mounting, ensures consistent performance, and protects against contamination from the factory.
- High Load Capacity: With a dynamic load rating of 2678 lbf and a static load rating of 1316 lbf, this angular contact bearing is capable of handling substantial combined loads in a compact bearing size (20x47x14 mm).
S7204 CD/HCP4A Bearing Typical Application Areas
The S7204 CD/HCP4A is ideally suited for high-performance rotational systems across various industries, including:
- High-Speed Machine Tool Spindles: For milling, grinding, and drilling where precision and speed are paramount.
- Precision Robotics: In robotic arm joints and actuators requiring high rigidity and accuracy.
- Aerospace & Defense Systems: In gyroscopes, avionics cooling fans, and other critical rotating assemblies.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and other small, high-RPM electric motors.
