S7018 ACD/P4ADBC
Sealed Super Precision Angular Contact Ball Bearings
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S7018 ACD/P4ADBC Bearing Product Overview & Core Advantages
The S7018 ACD/P4ADBC is a precision duplex back-to-back angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This pre-matched set, featuring a P4A tolerance class and moderate preload (Class C), is engineered to handle combined radial and axial loads simultaneously. Its sealed construction with phenolic cage and grease lubrication ensures high reliability and long-term performance in high-speed and high-precision environments, making it an ideal choice for critical spindle applications.
S7018 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a Duplex (two-bearing) set. |
| P4A | Specifies a high-precision tolerance class (superior to ABEC 7). |
| DB | Denotes the Back-to-Back mounting arrangement, which provides high moment rigidity. |
| Sealed | The bearing is sealed to retain lubricant and exclude contaminants. |
S7018 ACD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a robust, pre-stressed system capable of withstanding heavy combined loads and significant moment loads, ensuring exceptional stiffness for precise shaft positioning.
Precision & High-Speed Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing achieves smooth operation and low vibration at high rotational speeds, with a limiting speed of 15,000 rpm.
Sealed & Lubricated for Long Life: The integrated seals protect against contamination and retain the factory-applied grease lubrication, enabling maintenance-free operation within a wide temperature range of -30°C to 110°C.
Optimized Internal Geometry: With a 25° contact angle, 20 precision balls, and chrome steel construction, the bearing is optimized for high-performance applications requiring superior dynamic and static load ratings.
S7018 ACD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Applications requiring high rigidity and accurate shaft alignment.
- Industrial Pumps & Compressors: For handling combined loads in demanding fluid-handling systems.
- High-Speed Automation & Robotics: Rotary joints and precision positioning axes.
