SF681xzz
SF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SF681xzz
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.17 g
Tolerance class
ABEC1
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
1.5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
4 mm
Outside diameter tolerance
-0.008mm to 0
Width
2 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
5 mm
Flange thickness
0.6 mm
Ball & Washer Dimensions
Ball diameter
0.6 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
19 lbf
Radial static load rating
5 lbf
Limiting speed
90 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
300 Series Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 19.4
/ each
In Stock
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SF681xzz Bearing Product Overview & Core Advantages
The SF681xzz is a miniature single row deep groove ball bearing designed for applications requiring compact dimensions and reliable performance. Featuring a shielded design and constructed entirely from stainless steel, this bearing offers excellent corrosion resistance. Its primary advantages include the ability to handle radial loads efficiently within a compact 1.5mm bore and 4mm outer diameter footprint, making it ideal for high-precision, space-constrained mechanisms. The design ensures smooth operation and long service life in demanding environments.
SF681xzz Bearing Model Code Explained, Specifications & Naming Convention
| Suffix / Prefix | Technical Meaning |
|---|---|
| SF681 | Base model number, defining the core dimensions (1.5mm bore, 4mm OD, 2mm width). |
| x | Placeholder for specific flange variations within the series. |
| zz | Indicates the bearing is shielded on both sides. This provides effective protection against contaminant ingress while minimizing friction compared to contact seals. |
SF681xzz Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With a width of just 2mm and a weight of 0.17g, this bearing is engineered for miniature applications where space and weight are critical factors.
- Shielded Protection: The non-contact stainless steel shields (zz) help retain lubrication and exclude larger contaminants, enhancing bearing life without significantly increasing rotational torque.
- Stainless Steel Construction: All components, including rings, balls, and cage, are made from stainless steel, providing excellent corrosion resistance and suitability for a wide temperature range of -30°C to 110°C.
- Precision Performance: Manufactured to ABEC1 tolerance class, ensuring consistent and reliable operation for general precision requirements.
- Optimized Internal Geometry: The deep groove raceway and 7 stainless steel balls are designed for efficient radial load carrying capacity, rated at 19 lbf dynamically.
SF681xzz Bearing Typical Application Areas
- Small Precision Motors (e.g., miniature DC motors)
- Medical Devices and Instrumentation (e.g., surgical hand tools, dental drills)
- Optical Encoders and Scanners
- Precision Gearboxes and Mechanisms
- Small Fans and Blowers
- Radio Control Models and Drones
