SMF72zz
SMF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMF72zz
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.6 g
Tolerance class
ABEC1
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
2 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
7 mm
Outside diameter tolerance
-0.008mm to 0
Width
3 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
1.2 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
66 lbf
Radial static load rating
21 lbf
Limiting speed
56.7 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.002mm to 0.013mm
Radial internal clearance
MC3
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Stainless Steel
Shield material
300 Series Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 3
/ each
In Stock
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SMF72zz Bearing Product Overview & Core Advantages
The SMF72zz is a miniature single row deep groove ball bearing engineered for precision applications requiring compact dimensions and reliable performance. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its shielded design provides effective contamination protection while maintaining low friction, making it ideal for applications demanding high rotational speeds and long service life in limited spaces.
SMF72zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| SMF72 | Bearing series and size code | Denotes a specific miniature bearing series with a 2mm bore and 7mm OD. |
| zz | Double-sided metal shields | Provides protection from contaminants on both sides, retaining lubrication and extending bearing life. |
SMF72zz Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a stainless steel cage, precision-ground 1.2mm balls, and optimized internal geometry enables a limiting speed of 56,700 rpm.
- Robust Load Capacity: The deep groove raceway and 7-ball complement effectively handle radial dynamic loads up to 66 lbf and static loads up to 21 lbf.
- Corrosion Resistance: All components, including rings, balls, cage, and shields, are manufactured from stainless steel, ensuring reliable operation in humid or mildly corrosive environments.
- Precision & Stability: Manufactured to ABEC1 tolerance class with a controlled MC3 radial internal clearance (0.002mm to 0.013mm), ensuring smooth and consistent operation.
- Integrated Flange: The bearing features a flange (8.2mm OD) for simplified mounting and precise axial location within a housing.
SMF72zz Bearing Typical Application Areas
This miniature flanged bearing is ideally suited for:
- Small Precision Motors: Used in drone motors, miniature DC motors, and stepper motors.
- Medical Devices: Found in surgical hand tools, dental drills, and pump mechanisms.
- Office Automation: Critical component in printers, scanners, and small cooling fans.
- Instrumentation & Robotics: Used in encoders, sensors, and miniature robotic joints.
- Consumer Electronics: Applicable in high-speed spindles of small power tools and personal care appliances.
