SF685
SF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SF685
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1.33 g
Tolerance class
ABEC1
Seal type
Open
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
3 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
0.8 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
MC3
Radial internal clearance
0.002mm to 0.013mm
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:
$ 1.59
/ each
In Stock
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SF685 Bearing Product Overview & Core Advantages
The SF685 is a metric miniature ball bearing designed for precision applications requiring 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. Its small bore diameter of 5mm and overall compact design make it ideal for applications where space is limited but high limiting speed and precision are demanded.
Model Code & Specification Breakdown
| Code/Parameter | Technical Significance |
|---|---|
| SF685 | Standard model designation for this specific bearing size. |
| Open (Seal Type) | No integral seals, allowing for higher speeds and custom lubrication. Requires a clean operating environment or external sealing. |
| ABEC1 | Defines the precision bearing tolerance class, ensuring consistent dimensional accuracy and runout for reliable operation. |
| MC3 Clearance | Specifies a radial internal clearance group (0.002mm to 0.013mm) suitable for most general applications. |
SF685 Bearing Structural Features & Performance Benefits
- Deep Groove Raceway & Single Row Design: The geometry of the raceways is optimized to support significant radial loads. The single row construction provides a compact and lightweight solution.
- Full Stainless Steel Construction: Both rings, balls, and the cage are made from stainless steel, providing superior resistance to corrosion and making the bearing suitable for harsh environments or washdown applications.
- High-Speed Capability: The open design, combined with a precision-stamped stainless steel cage, minimizes friction and allows for a high limiting speed of 40,500 rpm, qualifying it as a high-speed bearing in its class.
- Precision Ground Components: Manufactured to ABEC1 tolerances, the bearing ensures smooth and quiet operation with minimal vibration, which is critical for sensitive instruments.
- Integrated Flange (Optional Feature): The bearing features a flange (12.5mm outer diameter) which simplifies mounting and positioning within a housing, enhancing assembly accuracy and rigidity.
SF685 Bearing Typical Application Areas
The SF685 miniature bearing is engineered for use in a wide range of compact and precision devices, including:
- Small Electric Motors: Ideal for spindle motors in drones, small fans, and precision DC motors.
- Precision Instruments & Medical Devices: Used in optical encoders, surgical hand tools, and laboratory equipment where reliability and compact size are paramount.
- Office Automation Equipment: Found in printers, scanners, and copiers for paper feed rollers and scanner heads.
- Robotics & RC Models: Suitable for joints, wheels, and drive systems in small-scale automated systems and hobbyist models.
