S639 2rs
600 Series Stainless Steel Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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S639 2rs Bearing Product Overview & Core Advantages
The S639 2rs is a metric single row deep groove ball bearing designed for high-performance applications requiring reliable radial load capacity and sealed operation. Constructed entirely from stainless steel (rings, balls, and cage), it offers excellent corrosion resistance. Its key advantage lies in the integration of nitrile rubber seals (2RS) on both sides, providing effective protection against contaminants while retaining lubrication. This makes the S639 2RS a compact, durable, and low-maintenance solution for various precision mechanisms.
S639 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S639 | Basic bearing designation indicating a single row deep groove design with a 9mm bore. | Defines the core geometry and size. |
| 2RS | Contact Rubber Seals on both sides of the bearing. | Provides superior sealing effectiveness against dust and moisture, making the bearing pre-lubricated and ready for use. |
S639 2rs Bearing Structural Features & Performance Benefits
- Robust Stainless Steel Construction: All critical components—inner ring, outer ring, balls, and cage—are manufactured from stainless steel. This ensures high corrosion resistance and suitability for harsh environments, including washdown applications.
- Optimized Deep Groove Raceway: The deep groove geometry is engineered for high radial dynamic load rating (802 lbf), efficiently handling significant radial forces.
- Effective Sealing with 2RS: The dual nitrile rubber contact seals create an effective barrier, protecting the bearing's interior from contaminants and retaining the factory-applied grease. This contributes to a long service life with minimal maintenance.
- Precision & Smooth Operation: Built to ABEC1 tolerance class with a controlled MC3 radial internal clearance (0.002mm to 0.013mm), ensuring smooth and quiet running, which is critical for sensitive applications.
S639 2rs Bearing Typical Application Areas
The S639 2RS is ideally suited for applications demanding reliability, corrosion resistance, and sealed operation. Common uses include:
- Food Processing & Packaging Equipment (conveyors, fillers)
- Medical and Laboratory Devices (small pumps, analyzers)
- Electrical Motors and Small Gearboxes
- Precision Instruments and Office Automation Equipment
- Any machinery operating in humid or corrosive environments where protection from contaminants is essential.
