S7018 CE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S7018 CE/HCP4ADGA Bearing Product Overview & Core Advantages
The S7018 CE/HCP4ADGA is a high-precision, double row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and rigidity. Its design enables it to simultaneously support substantial combined loads (radial and bidirectional axial loads) with high running accuracy. Featuring a universal matchable (SU) design, two bearings can be paired in any combination to achieve the desired preload, offering superior design flexibility. The use of ceramic balls and a phenolic cage contributes to its high-speed capability, low heat generation, and extended service life, making it an ideal choice for high-performance spindles and precision machinery.
Model Code Breakdown
| S7018 | Basic bearing series and size designation (90mm bore, 140mm OD). |
| CE | Indicates the use of ceramic balls (typically Silicon Nitride), which reduce centrifugal forces, lower operating temperatures, and enable higher speeds. |
| HC | Refers to the phenolic (Polyamide) cage material, offering excellent strength-to-weight ratio, reduced friction, and suitability for high-speed operation. |
| P4A | Specifies the tolerance class P4A, denoting very high precision levels for both dimensional and running accuracy, superior to standard ABEC 7/P4. |
| DGA | Signifies a sealed bearing that is pre-lubricated with grease. This provides effective contamination exclusion and ensures long-term, maintenance-free operation. |
S7018 CE/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double row angular contact design provides significantly higher radial and axial rigidity compared to single row bearings. This robust construction allows it to handle heavy combined loads from multiple directions, ensuring stable performance under demanding conditions.
Superior High-Speed Performance: The combination of lightweight ceramic balls and a phenolic cage minimizes centrifugal forces and inertial drag. This results in lower operating temperatures and a very high limiting speed of 15,000 rpm, making it suitable for high-speed spindle applications.
Precision and Longevity: Manufactured to P4A tolerance class, this bearing guarantees exceptional running accuracy and rotational precision. The integral seals and factory-applied grease provide reliable, maintenance-free operation by effectively keeping contaminants out and retaining lubrication over a wide temperature range (-30°C to 110°C).
S7018 CE/HCP4ADGA Bearing Typical Application Areas
The S7018 CE/HCP4ADGA is ideally suited for high-performance machinery where precision, speed, and reliability are paramount. Key application areas include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and milling spindles.
- Precision Instrumentation: High-accuracy measuring devices and laboratory equipment.
- High-Frequency Motors and Spindles: Applications requiring minimal vibration and high rotational accuracy.
- Advanced Robotics: Critical joints and axes demanding high rigidity and precision.
