Aluminum Flexible Shaft Coupling 5mm x 8mm Helical
Brand: China3D Printer & CNC Parts
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Prices updated: 13 Oct 2026
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About this product
A one-piece aluminum helical flexible coupling that joins two shafts with different diameters, 5mm on one end and 8mm on the other. It is used in 3D printers, CNC machines and robot builds to connect a motor shaft to a lead screw or another shaft, and it absorbs small misalignments.
Specifications
- Material
- Aluminum
- Bore diameter d1
- 5mm
- Bore diameter d2
- 8mm
- Backlash
- Zero
- Construction
- One piece
Frequently asked questions
Does it fit a NEMA 17 stepper motor?
Many NEMA 17 steppers use a 5mm shaft, which matches the 5mm bore on one end. Check your motor shaft diameter before fitting.
What is the 8mm bore used for?
The 8mm bore suits a shaft of that diameter, such as many lead screws. Confirm your shaft diameter before fitting the coupling.
