This is a 5mm (0.2") to 8mm (0.31") Aluminum coupler. A common application for this coupler is to connect a stepper motor with a 5mm (0.2") axis to a larger 8mm (0.31") rod. In 3D printers it is commonly used to opperate a threaded rod.
This coupler is cut like a spring, giving it a flexible and spring property. ​


  • outer diameter: 20mm (0.79")
  • Lenght: 25mm (0.98")
  • Fastening screws: 2 (1 for each side)
  • Material: Aluminum


  • 5 - 8 mm (0.2x0.31") Coupling x1


Brand DFRobot

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