F688
F Series Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
F688
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
3.53 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
8 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
16 mm
Outside diameter tolerance
-0.008mm to 0
Width
4 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
18 mm
Flange thickness
1 mm
Ball & Washer Dimensions
Ball diameter
2 mm
Ball quantity
10
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
239 lbf
Radial static load rating
107 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.002mm to 0.013mm
Radial internal clearance
MC3
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
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
F688 Bearing Product Overview & Core Advantages
The F688 is a metric miniature ball bearing designed for high-precision applications requiring compact dimensions and reliable performance. As a single row deep groove ball bearing, it excels at handling radial loads while also accommodating moderate axial loads in both directions. Its open design ensures low friction and high-speed capability, making it an ideal component for applications demanding high rotational accuracy and efficiency. Manufactured with chrome steel rings and balls, it offers excellent durability and is compliant with RoHS and REACH standards.
F688 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| F688 | Standard designation for this specific bearing size (8mm bore, 16mm OD, 4mm width). |
| Open (Seal Type) | No seals or shields, enabling high-speed operation and easy re-lubrication. Requires a clean operating environment. |
| ABEC1 | Specifies the tolerance class, indicating standard precision suitable for most industrial applications. |
| C3 (Radial Clearance) | Greater than normal internal clearance, beneficial for applications with thermal expansion or where interference fits are used. |
F688 Bearing Structural Features & Performance Benefits
- Deep Groove Raceway & High-Capacity Design: The deep groove geometry enables the F688 to support significant radial dynamic load ratings (239 lbf) and accommodate combined loads, providing versatile performance in compact spaces.
- Optimized for High Speed: The stainless steel cage ensures stability and low friction at the specified limiting speed of 36,000 rpm, making it a capable high-speed bearing.
- Precision Engineering: Manufactured to ABEC1 tolerances with tight dimensional control on the bore diameter and outside diameter, ensuring consistent performance and ease of installation.
- Robust Material Construction: Components made from chrome steel provide high hardness and wear resistance, while the stainless steel cage offers corrosion resistance for enhanced longevity.
F688 Bearing Typical Application Areas
- Small Electric Motors: Ideal for spindle and rotor support in miniature DC motors, fans, and drones.
- Precision Instruments: Used in optical encoders, gauges, and medical devices where miniature bearing size and accuracy are critical.
- Office Automation Equipment: Suitable for printers, scanners, and copiers requiring quiet and reliable rotation.
- Robotics and Automation: Applied in small joints, guides, and actuators within compact robotic systems.
