S7005 CD/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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S7005 CD/HCP4ADT Bearing Product Overview & Core Advantages
The S7005 CD/HCP4ADT is a precision duplex tandem angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. This matched set of two bearings is preloaded and configured in a tandem (DT) arrangement, enabling it to handle significant combined loads (radial and axial) in one direction with exceptional accuracy and stability. Its construction with a phenolic cage and ceramic balls contributes to its superior high-speed performance and low heat generation, making it ideal for high-precision spindles and other critical machinery.
S7005 CD/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| 7005 | Standard bearing series designation, indicating a 25mm bore, 47mm OD, and 12mm width per bearing. |
| C | 15° contact angle, optimized for high-speed operation. |
| D | Indicates a duplex (two-bearing) set. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls, which reduce friction, weight, and heat, enabling higher speeds. |
| P4A | High-Precision Tolerance Class, providing extremely tight running accuracy for applications requiring minimal runout and vibration. |
| DT | Duplex Tandem arrangement. The two bearings are mounted together to increase axial load capacity in a single direction. |
S7005 CD/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The duplex tandem (DT) arrangement and preload create an exceptionally rigid bearing system, capable of withstanding heavy combined loads. This configuration significantly increases axial load capacity compared to a single bearing.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls (Hybrid Ceramic) reduces centrifugal forces and friction, allowing for a very high limiting speed of 83,000 rpm. The 15° contact angle is also optimized for such speeds.
- Enhanced Precision and Longevity: The P4A tolerance class ensures minimal runout for superior rotational accuracy. Ceramic balls are also electrically resistant and less prone to wear, contributing to a longer service life in demanding conditions.
- Maintenance-Free Operation: The bearings are sealed and pre-lubricated with grease, protecting against contamination and providing long-term, maintenance-free operation within the specified temperature range.
S7005 CD/HCP4ADT Bearing Typical Application Areas
This high-performance bearing set is engineered for advanced applications where speed, precision, and rigidity 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.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: Dental handpieces and high-speed centrifuges.
