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    6mm Rigid Flange Shaft Coupling

    6mm rigid flange coupling connector for DIY RC motors, this coupling has a precision machined bore and flange face to ensure smooth and efficient power transmission between shafts. The rigid flange shaft coupling is ideal for machines requiring high torque and low backlash.
    SKU: ATO-FC-06
    30-day Returns
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    Delivery date: 6-12 days

    The compact design of the 6mm rigid flange shaft coupling makes it easy to integrate into your system, resulting in streamlined and efficient operation. ATO flange shaft couplings are designed to minimize vibration and noise, ensuring smooth and quiet operation.


    • Model: ATO-RFC-06
    • Inner Diameter: 6mm
    • Treatment Process: Oxidation
    • Processing Accuracy: ±0.05mm
    • Tolerance: 0.05mm
    • Weight: 76.8g


    • A rigid flange shaft coupling is a special coupling that fixes a shaft to a flat surface and allows easy mounting of other accessories on the shaft.
    • The rigid flange shaft coupling is made of high quality aluminium alloy, which is hard and resistant to moisture and rust, and has a long service life.
    • 6mm rigid flange coupling connector is suitable for connecting model shafts, perfect for RC model motors etc.
    • The rigid flange coupling connector is relatively easy to install, thanks to its simple design and few moving parts.

    Dimension (Unit mm)

    6mm rigid flange coupling dimension 


    A flange coupling is a type of mechanical joint that is used to connect two rotating shafts in order to transmit power. Flange couplings are commonly used in industrial machinery and equipment, such as pumps, compressors, and turbines. The field of application for flange couplings is wide-ranging and includes industries such as oil and gas, power generation, water treatment, and manufacturing.  

    Gear coupling applications.

    Tips: What are the common causes of failure in flange couplings?

    Flange couplings are commonly used in mechanical systems to connect rotating shafts and transmit power between them. Some common causes of failure in flange couplings include:

    • Overloading: Flange couplings can fail due to excessive loads or torque that exceed their design capacity. This can cause deformation, cracking or shearing of the flanges or bolts.
    • Misalignment: When the shafts are not properly aligned, it can create bending or twisting forces on the flange couplings, leading to premature failure of the coupling or its components.
    • Improper installation: Flange couplings must be installed and tightened according to the manufacturer's specifications. Improper installation, including uneven torque, can cause damage to the flanges or bolts, leading to failure.
    • Corrosion: Exposure to corrosive environments can weaken the material of the flange couplings and lead to failure.
    • Fatigue: Repeated loading and unloading of flange couplings can cause fatigue failure, resulting in cracks or other forms of damage to the coupling.
    • Wear and tear: As the flange coupling is used over time, its components can experience wear and tear, leading to a loss of tension in bolts, or damage to sealing surfaces.
    • Material defects: Flange couplings can fail due to manufacturing defects or material inconsistencies that compromise their structural integrity.
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