S7018 ACD/P4ATGC
Sealed Super Precision Angular Contact Ball Bearings
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Main Dimensions
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S7018 ACD/P4ATGC Bearing Product Overview & Core Advantages
The S7018 ACD/P4ATGC is a precision double row angular contact ball bearing engineered for applications demanding exceptional rigidity and accuracy. Its design enables it to simultaneously support substantial combined loads (radial and bidirectional axial loads), making it an ideal choice for high-performance machinery. Featuring a P4A tolerance class, a 25° contact angle, and a phenolic cage, this bearing is optimized for high-speed operation and superior running accuracy. Its sealed and pre-lubricated design ensures long-term reliability and reduced maintenance.
S7018 ACD/P4ATGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit / Implication |
|---|---|---|
| S7018 | Basic bearing series and size designation (90mm bore, 140mm OD). | Defines the core bearing dimensions. |
| ACD | Angular Contact, Double Row design. | Provides high rigidity and the ability to handle combined loads from both directions. |
| P4A | High precision tolerance class (superior to ABEC 7). | Ensures extremely low running noise and vibration for high-precision applications. |
| TGC | Refers to the phenolic (Polyamide) cage and grease lubrication. | The cage contributes to high-speed performance and low friction, while the grease offers reliable lubrication. |
S7018 ACD/P4ATGC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row angular contact design and 25° contact angle create a highly rigid structure capable of supporting significant radial dynamic load ratings of 36,675 lbf and static load ratings of 48,600 lbf. This makes it exceptionally resistant to deformation under combined loads.
High-Speed Performance: The lightweight and robust phenolic cage is instrumental in achieving a high limiting speed of 15,000 rpm. It offers excellent dimensional stability and low friction, even at elevated temperatures.
Precision & Reliability: Manufactured to a P4A tolerance class with tight dimensional controls on the bore, outside diameter, and width, this bearing ensures precise shaft positioning and smooth operation. The sealed construction and factory-applied grease lubrication provide a maintenance-free solution within its specified temperature range of -30°C to 110°C.
Universal Matchability (SU): This bearing is universally matchable, allowing multiple bearings to be mounted together in a set (typically 3) to achieve even higher rigidity and load capacity without the need for selective matching.
S7018 ACD/P4ATGC Bearing Typical Application Areas
The S7018 ACD/P4ATGC is ideally suited for high-demand sectors where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Industrial Pumps & Compressors: Where reliable operation under combined loads is critical.
- High-Frequency Motors and Spindles: In applications requiring minimal vibration and high rotational accuracy.
- Robotics and Automation Equipment: For joint and arm articulation requiring high rigidity and responsiveness.
- Medical and Laboratory Equipment: In centrifuges and other precision instruments.
