4mm Short Coupling for Robot Smart Car Wheel – 4 mm Length: 18mm

  1. Type: Hexagonal coupling.
  2. Material: Brass.
  3. Inner diameter: 4 mm.
  4. Total length: 18 mm.
SKU: ND045 Category:


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The 4mm Hex coupling for Robot Smart Car Wheel 30mm Length is a compact coupling for joining your motor to the smart car wheel. They are mostly seen in smart cars, robotic vehicles or small robots.

4mm Hex Coupling is made from high-quality brass which allows you to connect the shaft of the motor and hub of the wheel. It equips a hexagonal socket through which you can connect the hub of the wheel at one end of the coupling. The other hollow end of the coupling is connected to the motor shaft.

They have very simple structure and installation also doesn’t require any special skills. It requires no maintenance except tightening the screws when needed.

It safely transfers the rotating power of your motor shaft to the robotic vehicle wheel.


Features : 

  1. Manufactured using good quality materials.
  2. Very easy to install.
  3. Requires no special attention once installed correctly.
  4. The small size makes them fit in compact spaces.
  5. Provides value to your money.

Package Includes :

1 x Short Coupling  4mm

1 x Coupling accessories.




Hexagonal coupling.



Inner diameter:


Total length:

18 mm.

Shipping Info


30.00 g