S7018 ACD/P4ADGC
Sealed Super Precision Angular Contact Ball Bearings
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Main Dimensions
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S7018 ACD/P4ADGC Bearing Product Overview & Core Advantages
The S7018 ACD/P4ADGC is a precision double row angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Engineered to a P4A tolerance class, it excels in supporting combined loads (radial and bidirectional axial loads) simultaneously. Its universal matchable (SU) design allows for flexible mounting arrangements, while the sealed construction and pre-lubrication ensure long-term, maintenance-free operation. This bearing is the ideal solution for high-precision, high-reliability machinery requiring superior performance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S7018 | Basic bearing series and size designation (90mm bore, 140mm OD). |
| AC | 25° Contact Angle, optimized for supporting significant axial loads. |
| D | Double row design for high rigidity and load capacity. |
| P4A | High-Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards for superior running accuracy. |
| DGC | Sealed on both sides with contact seals for effective contamination exclusion and grease retention. |
S7018 ACD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design provides a rigid support system, enabling the bearing to handle substantial combined radial and axial loads from both directions. With a dynamic load rating of 27,225 lbf and a static load rating of 32,175 lbf, it is built for demanding applications.
- Precision Performance: Manufactured to P4A tolerance standards with a Moderate (Class C) preload, this bearing ensures minimal runout and vibration, which is critical for high-speed and high-accuracy applications.
- Optimized Internal Design: The phenolic cage is lightweight and robust, contributing to smooth operation at high speeds. With 20 precision balls of 15.875 mm diameter, the internal geometry is optimized for stable performance.
- Sealed & Lubricated for Life: The integrated contact seals (DGC) effectively shield the bearing from contaminants and retain the grease lubrication. This creates a maintenance-free system with a wide operating temperature range of -30°C to 110°C.
S7018 ACD/P4ADGC Bearing Typical Application Areas
The S7018 ACD/P4ADGC is ideally suited for high-performance machinery where precision, rigidity, and reliability are paramount. Key application areas include:
- Machine Tool Spindles: For milling, grinding, and turning centers requiring high speed and accuracy.
- Precision Gearboxes: In robotics, aerospace, and other high-tech industries.
- High-Speed Motors and Pumps: Where reliable performance under combined loads is essential.
- Medical and Laboratory Equipment: For imaging devices and analytical instruments demanding smooth, quiet operation.
