SMR137 2rs
SMR Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMR137 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
2.01 g
Tolerance class
ABEC1
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
7 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
13 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
1.2 mm
Ball quantity
12
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
93 lbf
Radial static load rating
45 lbf
Limiting speed
36 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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SMR137 2rs Bearing Product Overview & Core Advantages
The SMR137 2RS is a single row deep groove ball bearing designed for precision applications requiring reliable performance in compact spaces. Constructed entirely from stainless steel (rings, balls, and cage), it offers excellent corrosion resistance. Its key advantage lies in its sealed design (2RS), which effectively retains lubrication and excludes contaminants, making it suitable for applications demanding low maintenance and long service life. This bearing is engineered to handle primarily radial loads efficiently within its compact dimensions of 7mm bore, 13mm OD, and 4mm width.
SMR137 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SMR137 | The base bearing designation, indicating the specific size series (7mm bore, 13mm OD, 4mm width). |
| 2RS | Denotes double rubber seals (one on each side). This provides superior protection against contamination and moisture, ensuring the integrity of the internal lubrication. |
SMR137 2rs Bearing Structural Features & Performance Benefits
- Robust Construction & Corrosion Resistance: Manufactured from stainless steel throughout, this bearing is ideal for environments exposed to moisture, chemicals, or washdowns, preventing rust and ensuring consistent performance.
- Effective Sealing: The Nitrile Rubber (NBR) seals (2RS) provide a reliable barrier, retaining lubricant and excluding dust, dirt, and other particulates. This contributes to a longer operational life and reduces the need for re-lubrication.
- Precision & Smooth Operation: Built to ABEC1 tolerance class, it offers reliable running accuracy for a wide range of general-purpose applications. The MC3 radial internal clearance (0.002mm to 0.013mm) is suitable for most standard operating conditions.
- High-Speed Capability: With a limiting speed of 36,000 rpm, it is well-suited for high-speed applications such as small spindles and precision instruments.
SMR137 2rs Bearing Typical Application Areas
This versatile miniature bearing is commonly found in:
- Precision Instruments and optical devices
- Small electric motors and high-speed spindles
- Medical equipment and dental handpieces
- Office automation equipment (e.g., printers, scanners)
- Radio-control models and drones
- Food processing machinery (benefiting from its stainless steel construction)
