SF685 2rs
SF Series Stainless Steel Flanged Miniature Bearings
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Part No.
Part No.
SF685 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
2.15 g
Tolerance class
ABEC1
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
11 mm
Outside diameter tolerance
-0.008mm to 0
Width
5 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
12.5 mm
Flange thickness
1 mm
Ball & Washer Dimensions
Ball diameter
1.588 mm
Ball quantity
8
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
123 lbf
Radial static load rating
46 lbf
Limiting speed
40.5 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
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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SF685 2rs Bearing Product Overview & Core Advantages
The SF685 2RS is a metric miniature deep groove ball bearing engineered for precision applications requiring compact design and reliable performance. Featuring a single row construction with integral rubber seals (2RS), this bearing provides effective protection against contaminants while retaining lubrication. Manufactured entirely from stainless steel (rings, balls, and cage), it offers excellent corrosion resistance. Its primary advantages include handling radial loads efficiently, maintaining stable operation across a wide temperature range (-30° to 110°C), and delivering smooth performance in compact spaces where space and weight are critical factors.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| SF685 | Basic bearing designation indicating 5mm bore diameter, 11mm outside diameter, and 5mm width |
| 2RS | Bearing features double rubber contact seals on both sides for superior contamination protection and lubricant retention |
SF685 2rs Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With dimensions of 5×11×5mm and weighing only 2.15g, this bearing is ideal for space-constrained applications requiring minimal weight.
- Enhanced Sealing Performance: The double rubber seals (2RS) provide excellent protection against dust, moisture, and other contaminants while effectively retaining lubrication.
- Corrosion Resistance: Complete stainless steel construction (rings, balls, and cage) ensures reliable performance in harsh environments and prevents rust formation.
- Precision Operation: Manufactured to ABEC1 tolerance class with controlled radial internal clearance (MC3: 0.002-0.013mm) for smooth, consistent operation.
- Optimized Load Capacity: Features 8 precision balls with 1.588mm diameter, providing balanced radial dynamic load rating of 123 lbf and static load rating of 46 lbf.
SF685 2rs Bearing Typical Application Areas
- Small Precision Motors: Ideal for miniature DC motors, stepper motors, and servo motors requiring reliable rotational performance
- Medical Devices: Suitable for surgical instruments, dental handpieces, and diagnostic equipment where precision and corrosion resistance are critical
- Office Automation Equipment: Used in printers, scanners, copiers, and other precision office machinery
- Instrumentation & Measurement Devices: Applied in precision gauges, sensors, and optical equipment requiring smooth, low-friction rotation
- Robotics & Automation: Perfect for small robotic joints, actuators, and positioning mechanisms in compact automation systems
