S684 2rs
600 Series Stainless Steel Miniature Bearings
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Part No.
Part No.
S684 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1 g
Tolerance class
ABEC1
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
4 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
9 mm
Outside diameter tolerance
-0.008mm to 0
Width
4 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
1.588 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
110 lbf
Radial static load rating
37 lbf
Limiting speed
47.7 X 1000 rpm
Lubrication
Required
Radial internal clearance
MC3
Radial internal clearance
0.002mm to 0.013mm
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Stainless Steel
Shield material
Nitrile Rubber
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.35
/ each
In Stock
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S684 2rs Bearing Product Overview & Core Advantages
The S684 2RS is a sealed single row deep groove ball bearing designed for precision applications requiring reliable performance in compact spaces. Engineered with stainless steel construction throughout its rings, balls, and cage, it offers excellent corrosion resistance. Its key advantage lies in its ability to handle radial loads efficiently while the 2RS dual rubber seals provide superior protection against contamination, making it ideal for applications demanding long service life and minimal maintenance. With an ABEC1 tolerance class and optimized internal geometry, it delivers smooth operation and consistent performance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S684 | Standard bearing series designation indicating metric dimensions: 4mm bore, 9mm OD, 4mm width. |
| 2RS | Bearing features contact rubber seals on both sides, providing effective protection against dust and moisture ingress. |
S684 2rs Bearing Structural Features & Performance Benefits
- Optimized Load Capacity: The deep groove raceway and 7 precision stainless steel balls enable efficient handling of radial dynamic loads up to 110 lbf, ensuring stable operation under various conditions.
- Enhanced Sealing Performance: The dual nitrile rubber seals (2RS) create an effective barrier against contaminants while retaining lubrication, significantly extending bearing service life in challenging environments.
- Precision Engineering: Manufactured to ABEC1 tolerance standards with MC3 radial internal clearance (0.002mm to 0.013mm), ensuring smooth rotation and reduced vibration for precision applications.
- Corrosion Resistance: Full stainless steel construction provides excellent resistance to corrosion, making it suitable for applications where exposure to moisture or chemicals is a concern.
- Temperature Compatibility: Operating temperature range of -30°C to 110°C with appropriate lubrication, accommodating various industrial environments.
S684 2rs Bearing Typical Application Areas
- Small Precision Motors: Ideal for miniature DC motors, stepper motors, and servo motors requiring reliable radial load support
- Medical Equipment: Used in surgical tools, dental handpieces, and diagnostic instruments where corrosion resistance and clean operation are critical
- Office Automation: Suitable for printers, scanners, and copiers requiring quiet operation and long-term reliability
- Instrumentation: Applied in measuring devices, optical equipment, and laboratory instruments demanding precision rotation and minimal friction
- Consumer Electronics: Used in small appliances, computer peripherals, and portable devices where compact size and reliable performance are essential
