F684
F Series Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
F684
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.74 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
4 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
9 mm
Outside diameter tolerance
-0.008mm to 0
Width
2.5 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
10.3 mm
Flange thickness
0.6 mm
Ball & Washer Dimensions
Ball diameter
1.588 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
123 lbf
Radial static load rating
41 lbf
Limiting speed
53 X 1000 rpm
Lubrication
Required
Radial internal clearance
MC3
Radial internal clearance
0.002mm to 0.013mm
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.32
/ each
In Stock
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F684 Bearing Product Overview & Core Advantages
The F684 is a metric miniature ball bearing designed for compact applications requiring reliable performance. As a single row deep groove ball bearing, it excels at handling primarily radial loads while also accommodating moderate axial loads in both directions. Its small footprint, with a 4 mm bore and 9 mm outside diameter, makes it ideal for space-constrained, high-precision assemblies. Manufactured to ABEC1 precision class with a MC3 radial internal clearance, it offers consistent operation and is engineered for applications demanding cost-effective, reliable rotational motion.
F684 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| F684 | The base model number, defining the core bearing dimensions (4mm bore, 9mm OD, 2.5mm width). |
| Open (Seal Type) | The bearing is supplied without seals or shields, allowing for higher limiting speeds and easy re-lubrication. It requires a clean operating environment. |
| ABEC1 | Specifies the precision tolerance class, ensuring runout and dimensional accuracy suitable for general industrial applications. |
| MC3 | Indicates a greater than normal radial internal clearance (0.002mm to 0.013mm), making it suitable for applications with potential thermal expansion or where interference fits are used. |
F684 Bearing Structural Features & Performance Benefits
- Optimized Deep Groove Raceway: The single-row deep groove design provides excellent radial load capacity and facilitates high-speed operation.
- High-Grade Material Construction: Rings and balls made from chrome steel offer high hardness and wear resistance, while the stainless steel cage ensures durability and corrosion resistance, contributing to a long service life.
- High-Speed Capability: The combination of an open design, precision-ground components, and a lightweight stainless steel cage enables a high limiting speed of 53,000 rpm.
- Flanged Outer Ring: The integrated flange (10.3mm diameter) simplifies mounting and positioning within a housing, enhancing assembly accuracy and rigidity.
- Standard Internal Design: Features 7 balls with a diameter of 1.588 mm, providing a balanced load distribution and smooth rotation.
F684 Bearing Typical Application Areas
This miniature bearing is widely used in compact, high-speed devices and precision instruments, including:
- Small Electric Motors: Such as those in drones, RC models, and small fans.
- Precision Instrumentation: Including optical encoders, gauges, and medical devices.
- Office Automation Equipment: Like small printers, scanners, and copiers.
- Computer Peripherals: Including cooling fans and small spindle drives.
