SMR137
SMR Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMR137
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1.52 g
Tolerance class
ABEC1
Seal type
Open
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
3 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
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 Bearing Product Overview & Core Advantages
The SMR137 is a metric single row deep groove ball bearing engineered for precision radial load applications. Constructed entirely from stainless steel (rings, balls, and cage), it offers excellent corrosion resistance and durability. Its compact design, with a 7mm bore and 13mm outside diameter, makes it ideal for space-constrained, high-reliability applications requiring smooth operation and consistent performance. The bearing is designed to accommodate primarily radial loads and operates effectively within a wide temperature range.
SMR137 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| SMR | Manufacturer's series prefix for miniature/metric bearings. |
| 137 | Specific size designation indicating a 7mm bore, 13mm OD, and 3mm width. |
| Open (Seal Type) | No integral seals or shields, allowing for high-speed operation and custom lubrication schemes. |
| ABEC1 | Standard precision tolerance class, ensuring reliable performance for general applications. |
| MC3 | Specifies a radial internal clearance group (0.002mm to 0.013mm) suitable for a wide range of operating conditions. |
SMR137 Bearing Structural Features & Performance Benefits
- All-Stainless-Steel Construction: Provides superior corrosion resistance, making it suitable for harsh environments, washdown applications, and medical equipment. The one-piece stainless steel cage ensures mechanical stability and smooth operation.
- Optimized Load Capacity: The deep groove raceway and complement of 12 precision balls enable efficient handling of radial dynamic loads up to 93 lbf and radial static loads up to 45 lbf.
- High-Speed Capability: The open design and low-friction stainless steel cage contribute to a high limiting speed of 36,000 rpm, ideal for demanding high-speed applications.
- Precision Engineering: Manufactured to ABEC1 tolerances with controlled internal clearance (MC3), ensuring consistent running accuracy and low vibration.
SMR137 Bearing Typical Application Areas
- Small Electric Motors and Fans
- Precision Instruments and Optical Encoders
- Medical and Dental Handpieces
- Office Automation Equipment (e.g., printers, scanners)
- Radio-Control Models and Drones
- Food Processing and Packaging Machinery (where corrosion resistance is critical)
