SMF74 2rs
SMF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMF74 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.3 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
7 mm
Outside diameter tolerance
-0.008mm to 0
Width
2.5 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
8.2 mm
Flange thickness
0.6 mm
Ball & Washer Dimensions
Ball diameter
1 mm
Ball quantity
8
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
44 lbf
Radial static load rating
17 lbf
Limiting speed
54 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:
$ 1.59
/ each
In Stock
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SMF74 2rs Bearing Product Overview & Core Advantages
The SMF74 2RS is a miniature sealed ball bearing designed for applications requiring compact dimensions and reliable performance. This single row deep groove ball bearing features integral rubber seals (2RS) for effective contamination exclusion. Manufactured entirely from stainless steel, it offers excellent corrosion resistance. Its compact design, with a 4 mm bore and 2.5 mm width, makes it ideal for space-constrained assemblies where radial load capacity and longevity are critical.
SMF74 2rs Bearing Model Code Explained, Specifications & Naming Convention
The model designation SMF74 2RS can be broken down as follows:
- SMF74: Denotes the specific bearing series with a 4mm bore and 7mm outside diameter.
- 2RS: Indicates the bearing is equipped with two rubber contact seals, one on each side. This provides superior protection against dust and moisture ingress compared to non-contact shields.
SMF74 2rs Bearing Structural Features & Performance Benefits
- Robust Sealing: The Nitrile Rubber (NBR) contact seals (2RS) effectively retain lubricant and exclude contaminants, enhancing bearing service life in demanding environments.
- Corrosion Resistance: Constructed from stainless steel rings, balls, and cage, this bearing is suitable for applications exposed to moisture or corrosive agents.
- Precision & Smooth Operation: Built to ABEC1 tolerance class with a MC3 radial internal clearance (0.002mm to 0.013mm), ensuring consistent and smooth running performance.
- High-Speed Capability: With a limiting speed of 54,000 rpm, it is well-suited for high-speed miniature applications such as small motors and precision instruments.
- Flanged Design: The integrated flange (8.2 mm outer diameter) simplifies mounting and positioning within a housing, aiding in accurate alignment.
SMF74 2rs Bearing Typical Application Areas
This bearing is commonly used in:
- Small Precision Motors (e.g., drone motors, miniature DC motors)
- Medical and Dental Handpieces
- Precision Instruments and Optical Devices
- Office Automation Equipment (e.g., printers, scanners)
- Radio-Control Models and Robotics
