SF687
SF Series Stainless Steel Flanged Miniature Bearings
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Part No.
Part No.
SF687
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
2.4 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
7 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
14 mm
Outside diameter tolerance
-0.008mm to 0
Width
3.5 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
16 mm
Flange thickness
1 mm
Ball & Washer Dimensions
Ball diameter
2 mm
Ball quantity
9
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
202 lbf
Radial static load rating
83 lbf
Limiting speed
36 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:
$ 1.59
/ each
In Stock
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SF687 Bearing Product Overview & Core Advantages
The SF687 is a metric miniature ball bearing designed for applications demanding compact size and reliable performance. As a single row deep groove ball bearing, it is engineered to handle primarily radial loads efficiently. Constructed entirely from stainless steel, it offers excellent corrosion resistance, making it suitable for various industrial and precision instruments. Its open design allows for versatile lubrication options to meet specific operational needs, providing a robust solution for high-speed, low-torque applications.
SF687 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SF687 | The base model number defining the bearing's core dimensions: 7mm bore, 14mm outside diameter, 3.5mm width. |
| Open (Seal Type) | No built-in seals or shields. This allows for higher limiting speeds and custom lubrication but requires a clean operating environment or external sealing. |
| MC3 | Specifies the radial internal clearance group (0.002mm to 0.013mm), which is standard for many general applications. |
| ABEC1 | The tolerance class, indicating standard precision levels suitable for a wide range of commercial and industrial uses. |
SF687 Bearing Structural Features & Performance Benefits
- Compact and Lightweight Design: With a bearing width of just 3.5mm and a weight of 2.4g, the SF687 is ideal for space-constrained and weight-sensitive applications.
- High-Speed Capability: The stainless steel cage and optimized ball quantity (9 balls of 2mm diameter) contribute to stable operation at its high limiting speed of 36,000 rpm.
- Corrosion Resistance: All components, including rings, balls, and cage, are made from stainless steel, ensuring long service life in humid or corrosive environments.
- Precision Performance: Manufactured to ABEC1 tolerances, this bearing provides consistent runout and smooth rotation, essential for precision instruments.
- Robust Load Capacity: Despite its small bearing dimensions, it offers a dynamic load rating of 202 lbf and a static load rating of 83 lbf for its size class.
SF687 Bearing Typical Application Areas
- Small Electric Motors: Ideal for spindle and rotor support in miniature DC motors and stepper motors.
- Precision Instruments: Used in optical encoders, gauges, and medical devices where small size and reliability are critical.
- Office Automation Equipment: Suitable for printers, scanners, and copiers.
- Robotics and RC Models: Provides smooth, low-friction rotation in joints and drive systems.
- Industrial Pumps and Gearboxes: For small-scale fluid handling and power transmission systems.
