F3-8
Miniature Thrust Ball Bearings
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Part No.
Part No.
F3-8
Basic Information
Bearing type
Ball
System of measurement
Metric
Weight
0.6 g
Seal type
Open
For load direction
Thrust
Main Dimensions
Bore diameter
3 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
8 mm
Outside diameter tolerance
-0.008mm to 0
Width
3.5 mm
Width tolerance
-0.12mm to 0
Chamfer dimension
0.1 mm
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
1.588 mm
Ball quantity
6
Washers type
flat raceway
Shaft washer outer diameter
7.8 mm
Performance
Temperature range
-30° to 110 °C
Axial dynamic load rating
135 lbf
Axial static load rating
108 lbf
Limiting speed
11 X1000 rpm
Lubrication
Required
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Brass
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.52
/ each
In Stock
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F3-8 Bearing Product Overview & Core Advantages
The F3-8 is a metric thrust ball bearing engineered for pure axial load applications requiring high precision and compact design. Its primary advantage lies in its ability to handle significant axial dynamic loads (135 lbf) within an extremely small envelope (3mm bore, 8mm OD), making it ideal for space-constrained, high-speed assemblies. Manufactured from chrome steel with a brass cage, it offers reliable performance and durability in demanding conditions.
F3-8 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| F3-8 | Standard model designation for a metric thrust ball bearing. |
| Open (Seal Type) | The bearing is unsealed, allowing for custom lubrication schemes but requiring a clean operating environment. |
| Flat Raceway (Washers Type) | Features flat washers, indicating a design optimized for handling thrust loads. |
F3-8 Bearing Structural Features & Performance Benefits
- High-Precision Design: With tight bore and outside diameter tolerances ( -0.008mm to 0), this bearing ensures precise shaft positioning and smooth operation, critical for high-speed applications.
- Optimized Thrust Capacity: The design, featuring a brass cage and six precision balls, is specifically engineered to support substantial axial dynamic and static loads, providing reliable thrust support.
- High-Speed Capability: The combination of the brass cage and a limiting speed of 11,000 rpm makes it suitable for rapid rotation applications where low friction and stability are paramount.
- Compact and Lightweight: With a minimal cross-section (3.5mm width) and a weight of only 0.6 grams, it is the ideal solution for miniaturized and weight-sensitive assemblies.
F3-8 Bearing Typical Application Areas
This thrust ball bearing is commonly specified in:
- Precision Instruments: Optical encoders, small gauges, and medical devices.
- Office Automation Equipment: Printers, scanners, and small drives.
- Small Motors and Gearboxes: Where axial loads are present in compact spaces.
- Aerospace and Defense Subassemblies: Actuators and control systems requiring reliable thrust support.
