S7018 CEGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7018 CEGA/P4A Bearing Product Overview & Core Advantages
The S7018 CEGA/P4A is a super-precision angular contact ball bearing engineered for the most demanding high-speed and high-rigidity applications. As a universally matchable (SU) bearing supplied in a set of four, it enables the creation of optimized, preloaded bearing arrangements with exceptional running accuracy. Its P4A tolerance class and 15° contact angle ensure superior performance under combined radial and axial loads, making it an ideal choice for machine tool spindles and other precision machinery where ultimate rotational accuracy and stability are paramount.
Model Code Breakdown
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| S7018 | Super-precision bearing series with 90mm bore | Denotes high-precision design and bearing dimensions |
| CE | Enhanced internal geometry design | Optimized for lower friction and higher limiting speed |
| GA | Light preload (Class A) | Provides optimal rigidity while minimizing heat generation |
| P4A | Super-precision tolerance class | Guarantees exceptional running accuracy and dimensional stability |
S7018 CEGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The optimized internal design and light preload (Class A) provide superior high rigidity and stability, enabling the bearing to handle significant combined radial and axial loads simultaneously. With a radial dynamic load rating of 8055 lbf and static load rating of 7200 lbf, it delivers reliable performance in demanding applications.
Exceptional High-Speed Performance: The phenolic resin cage and precision-ground chrome steel balls (11.112mm diameter) are engineered for high rotational accuracy and low centrifugal forces. This construction, combined with the optimized internal geometry (CE designation), enables the bearing to achieve a remarkable limiting speed of 15,000 rpm.
Precision Engineering: Manufactured to P4A super-precision tolerance standards with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration. The universal matchable (SU) design allows for flexible mounting configurations in preloaded sets, providing engineers with versatile solutions for complex spindle designs.
S7018 CEGA/P4A Bearing Typical Application Areas
The S7018 CEGA/P4A is specifically designed for high-performance applications requiring extreme precision and speed:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling machine spindles
- High-Speed Motors: Precision electric motors and high-frequency spindles
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and laboratory centrifuges
- Semiconductor Manufacturing: Wafer handling robots and precision positioning stages
