7018 CE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7018 CE/HCP4ADT Bearing Product Overview & Core Advantages
The 7018 CE/HCP4ADT is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) arrangement bearing set is preloaded and manufactured to a P4A tolerance class, ensuring ultra-precise rotational accuracy and minimal runout. Its core advantages include the ability to handle high combined loads (radial and axial), superior high-speed capability facilitated by a phenolic cage and ceramic balls, and outstanding operational rigidity. This configuration is ideal for machine tool spindles and other high-performance machinery where precision, speed, and reliability are paramount.
7018 CE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7018 | Standard bearing series and size designation. | Defines the core dimensions: 90mm bore, 140mm OD, 48mm width. |
| C | 15° contact angle design. | Optimized for high axial load capacity and high-speed operation. |
| E | Optimized internal design. | Enhanced performance through improved internal geometry and ball complement. |
| HC | Hybrid Ceramic construction. | Features ceramic balls for reduced friction, higher speed, and longer service life. |
| P4A | High-Precision Tolerance Class. | Exceeds ABEC 7/ISO P4 standards, offering extremely tight dimensional and running accuracy for the most critical applications. |
| DT | Duplex Tandem arrangement. | Two bearings are mounted together to significantly increase axial load capacity in one direction. |
7018 CE/HCP4ADT Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of silicon nitride (Si3N4) ceramic balls with a chrome steel ring provides significant performance benefits, including lower operating temperature, reduced wear, and the ability to run at higher speeds compared to all-steel bearings.
Phenolic Cage: The lightweight and robust phenolic resin cage contributes to excellent high-speed performance and stability, capable of handling the limiting speed of 15,000 rpm.
Duplex Tandem (DT) Arrangement with Preload: This configuration, consisting of two matched bearings, is designed to handle very high unidirectional axial loads. The supplied preload ensures maximum system rigidity and precise rotational accuracy, minimizing deflection under load.
High-Precision Manufacturing: Manufactured to P4A tolerance class with tight bore, outside diameter, and width tolerances, this bearing guarantees exceptional running accuracy, low noise, and vibration levels.
7018 CE/HCP4ADT Bearing Typical Application Areas
The 7018 CE/HCP4ADT is engineered for the most demanding high-speed and high-precision applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for CNC applications.
- Aerospace & Defense Systems: Gyroscopes and other precision instruments.
