SF681
SF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SF681
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.04 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
1 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
3 mm
Outside diameter tolerance
-0.008mm to 0
Width
1 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
3.8 mm
Flange thickness
0.3 mm
Ball & Washer Dimensions
Ball diameter
0.6 mm
Ball quantity
6
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
17 lbf
Radial static load rating
4 lbf
Limiting speed
117 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:
$ 21.76
/ each
In Stock
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SF681 Bearing Product Overview & Core Advantages
The SF681 is a miniature metric ball bearing engineered for applications demanding compact dimensions and reliable performance. As a single row deep groove ball bearing with an open design, it excels in handling radial loads efficiently. Manufactured entirely from stainless steel, it offers excellent corrosion resistance, making it suitable for various industrial and precision instruments. Its small bearing size (1mm bore, 3mm OD) and lightweight construction (0.04g) are ideal for space-constrained assemblies.
SF681 Bearing Model Code Explained, Specifications & Naming Convention
| Code Element | Technical Significance |
|---|---|
| SF681 | Basic bearing designation indicating specific dimensions (1x3x1mm). |
| Open | No seals or shields, allowing for higher possible speeds and easy re-lubrication. |
| ABEC1 | Specifies the precision class, defining standard tolerances for runout and dimensions. |
| MC3 | Indicates the radial internal clearance group (0.002mm to 0.013mm), suitable for most general applications. |
SF681 Bearing Structural Features & Performance Benefits
- Deep Groove Raceway: The optimized raceway geometry enables smooth operation and effective handling of radial loads.
- Stainless Steel Construction: All components, including rings, balls, and the cage, are made from stainless steel, providing superior corrosion resistance and durability in harsh environments.
- High-Speed Capability: The open design and precision manufacturing contribute to a high limiting speed of 117,000 rpm, making it a capable high-speed bearing for miniature applications.
- Precision Performance: Manufactured to ABEC1 tolerances, ensuring consistent and reliable operation with minimal vibration.
SF681 Bearing Typical Application Areas
- Small DC Motors and Miniature Gearboxes
- Precision Medical Devices and Dental Handpieces
- Optical Encoders and Laboratory Instruments
- Small Fans and Cooling Modules
- Robotics (Small Joints and Actuators)
- Radio-Controlled Models and Drones
