7018 CE/HCP4ALDT
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7018 CE/HCP4ALDT Bearing Product Overview & Core Advantages
The 7018 CE/HCP4ALDT is a precision angular contact ball bearing engineered for demanding applications requiring exceptional performance. This duplex tandem (DT) arrangement bearing set is preloaded and manufactured to the stringent P4A tolerance class, ensuring superior running accuracy and rotational precision. Its defining characteristic is the ability to handle high combined loads, particularly substantial axial loads in one direction, making it ideal for high-speed, high-rigidity spindles. The use of ceramic balls and a phenolic cage contributes to its outstanding high-speed performance and reduced operational friction.
7018 CE/HCP4ALDT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 7018 | Standard bearing series with 90mm bore, 140mm OD. | Defines the core bearing dimensions. |
| CE | 15° Contact Angle. | Optimized for high-speed operation and axial load capacity. |
| HC | Hybrid Ceramic (Silicon Nitride balls). | Reduced weight, lower friction, and superior high-speed capability. |
| P4A | High precision tolerance class (superior to ABEC 7). | Guarantees minimal runout and vibration for ultra-precise applications. |
| DT | Duplex Tandem Matched Arrangement. | Two bearings are mounted together to share loads and increase axial stiffness in one direction. |
7018 CE/HCP4ALDT Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The duplex tandem (DT) arrangement creates a highly rigid bearing system capable of withstanding significant combined radial and axial loads. The preload eliminates internal clearance, further enhancing system stiffness and rotational accuracy.
Superior High-Speed Performance: The combination of lightweight ceramic balls and a phenolic resin cage is critical for high-speed operation. This configuration reduces centrifugal forces, minimizes friction and heat generation, and allows the bearing to achieve its high limiting speed of 15,000 rpm.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on the bore, outside diameter, and width, this bearing ensures predictable performance and precise shaft positioning in the most demanding machinery.
Optimized for Lubrication: The bearing comes lubricated from the factory and features an open seal design, which is ideal for systems where the bearing is integrated into a centralized or oil-mist lubrication system for maximum efficiency and heat dissipation.
7018 CE/HCP4ALDT Bearing Typical Application Areas
The 7018 CE/HCP4ALDT is specifically designed for high-performance 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: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units (APUs).
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
