S7213 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7213 CD/HCP4A Bearing Product Overview & Core Advantages
The S7213 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. Its design is optimized to simultaneously handle combined loads—significant radial loads and axial loads in one direction. A key feature is its ceramic ball material (Silicon Nitride), which, combined with a phenolic cage and P4 (ABEC-7) super-precision tolerance, enables superior high-speed performance, reduced friction, and extended service life. This bearing is preloaded and pre-lubricated, making it an ideal, ready-to-install solution for high-rigidity, high-RPM spindle systems.
Model Code Breakdown
| Model Segment | Technical Meaning | Significance & Benefit |
|---|---|---|
| S7213 | Bearing series and size designation | Indicates a 65mm bore, 120mm OD, 23mm width angular contact bearing. |
| CD | 15° contact angle and high rigidity design | Optimized for high-speed operation and excellent axial load capacity. |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Provides higher speed capability, lower heat generation, and longer life compared to all-steel bearings. |
| P4A | P4 (ABEC-7) tolerance class with specific running accuracy | Ensures ultra-precise running accuracy and minimal vibration for critical applications. |
S7213 CD/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and provides electrical insulation, enabling higher limiting speeds (15,000 rpm) and superior performance in electrically harsh environments.
High Rigidity & Preload: The bearing is supplied with a light preload, eliminating internal clearance. This ensures maximum system rigidity, precise rotational accuracy, and reduced noise and vibration under high-speed operation.
Optimized Cage & Lubrication: The phenolic resin cage is lightweight and possesses excellent slip characteristics, contributing to smooth high-speed rotation. The bearing is factory-filled with a high-performance grease suitable for its specified temperature range (-30°C to 110°C).
Super-Precision Tolerance: Manufactured to P4 (ABEC-7) tolerance class, this bearing guarantees minimal runout and consistent performance, which is critical for applications like machine tool spindles.
S7213 CD/HCP4A Bearing Typical Application Areas
The S7213 CD/HCP4A is designed for high-performance applications where speed, precision, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- High-Frequency Motors & Spindles: PCB drilling spindles and dental handpieces.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units.
