S638 2rs
600 Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S638 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
30.3 g
Tolerance class
ABEC1
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
8 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
28 mm
Outside diameter tolerance
-0.008mm to 0
Width
9 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
785 lbf
Radial static load rating
321 lbf
Limiting speed
25.2 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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S638 2rs Bearing Product Overview & Core Advantages
The S638 2rs is a sealed deep groove ball bearing designed for reliable performance in demanding applications. Constructed entirely from stainless steel (rings, balls, and cage), it offers excellent corrosion resistance. Its key advantage lies in its ability to handle radial loads efficiently while the integrated RS seal protects against contaminants and retains lubrication, making it a robust, low-maintenance solution for various industrial and precision equipment.
S638 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel Construction |
| 6 | Deep Groove Ball Bearing Series |
| 38 | Bore Diameter Code (8 mm) |
| 2RS | Contact Seals on Both Sides (Nitrile Rubber) |
S638 2rs Bearing Structural Features & Performance Benefits
- Superior Sealing & Contamination Resistance: The 2RS designation indicates nitrile rubber contact seals on both sides, effectively shielding the bearing's interior from dust, moisture, and other contaminants, while retaining lubricant for extended service life.
- Corrosion-Resistant Construction: Manufactured entirely from stainless steel, this bearing is ideal for applications exposed to corrosive environments, humidity, or requiring frequent washdowns.
- Optimized Load Capacity: The deep groove raceway and 7 precision balls enable efficient handling of radial dynamic loads up to 785 lbf and static loads up to 321 lbf.
- Precision & Smooth Operation: Built to ABEC1 tolerance class with a controlled MC3 radial internal clearance (0.002mm to 0.013mm), ensuring smooth rotation and consistent performance.
- Compact & Lightweight Design: With dimensions of 8x28x9 mm and a weight of just 30.3 grams, it is suitable for space-constrained applications.
S638 2rs Bearing Typical Application Areas
- Food Processing and Packaging Machinery
- Medical and Dental Equipment
- Chemical and Pharmaceutical Processing Pumps
- Precision Instruments and Optical Devices
- Electric Motors and Small Gearboxes
- Agricultural and Marine Equipment (corrosive environments)
