SMF72
SMF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SMF72
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.5 g
Tolerance class
ABEC1
Seal type
Open
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
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
1.2 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
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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SMF72 Bearing Product Overview & Core Advantages
The SMF72 is a miniature single row deep groove ball bearing designed for applications requiring compact dimensions and reliable performance. Manufactured entirely from stainless steel, it offers excellent corrosion resistance. This bearing is engineered to primarily support radial loads and is characterized by its open design, requiring external lubrication. Its small size, high precision ABEC1 tolerance, and robust construction make it ideal for high-speed, miniature mechanisms demanding consistent operation and long service life.
SMF72 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SMF72 | The base model number, defining the core bearing dimensions (2mm bore, 7mm OD, 2.5mm width). |
| No Seal Suffix | Indicates an open bearing design. This allows for optimal lubrication flexibility but requires a sealed housing or specific lubrication system in contaminated environments. |
| (Implied) | The stainless steel construction and ABEC1 precision class are inherent to this model's standard specification. |
SMF72 Bearing Structural Features & Performance Benefits
- All-Stainless-Steel Construction: The rings, balls, and cage are made of stainless steel, providing superior corrosion resistance and making the bearing suitable for applications exposed to moisture or harsh chemicals.
- Deep Groove Raceway: The geometry of the deep groove raceway is optimized for handling radial loads efficiently. The single-row design ensures a compact cross-section.
- High-Speed Capability: With a limiting speed of 56,700 rpm, this bearing is engineered for high-speed operation, facilitated by its precision-ground components and stable stainless steel cage.
- Precision Performance: Manufactured to ABEC1 tolerance class, it ensures smooth and quiet running, reducing vibration and noise in sensitive applications.
- Standard Internal Clearance (MC3): The specified radial internal clearance (0.002mm to 0.013mm) is suitable for a wide range of operating conditions, providing a balance between preload and thermal expansion management.
SMF72 Bearing Typical Application Areas
- Small Precision Motors: Ideal for spindle support in miniature DC motors and stepper motors.
- Medical and Dental Devices: Used in handheld surgical tools, dental handpieces, and pump drives where corrosion resistance and reliability are critical.
- Office Automation Equipment: Suitable for scanners, printers, and copiers.
- Instrumentation and Control Systems: Applied in encoders, sensors, and precision gauges.
- Radio-Controlled Models and Miniature Robotics: Provides durable and high-speed support in drive systems and joints.
