4mm x 3.17mm Motor Shaft Coupling Joint

Use this universal metal joint to connect 2 motor shafts or axles. Fits 4mm shafts on one side and 3.17mm shafts on the other with set screws for size adjustment!

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  • Shaft Coupling Joint
  • Supported Shaft Size Side A: between 3mm and 5mm
  • Supported Shaft Size Side B: between 2.17mm and 4.17mm
  • Compatible with 2.17-5mm axles, Brushless and Brushed motors
  • Metal joint diameter: 9mm
  • Side hole threads: M3
  • Tighten the set screws on each side so it fits snugly on any shaft with diameter in the range above.



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