5mm to 3/8" Precision Flex Shaft Coupling

5mm to 3/8" Precision Flex Shaft Coupling

Precision Machined Aluminum Flex Coupling - 5mm to 3/8" For OneUp and TwoUp 3D Printers

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These are simply the best shaft couplers on the market today.  They couple a 5mm shaft (ie,  your NEMA 17 motor) to an 3/8" rod (your Z-screws) providing concentric movement (virtually no wobble!).  The couplers have machine grooves cut into their periphery that provide flexibility in the union of the shaft and rod when they are not perfectly aligned.


  • Precision Machined Billet Aluminum
  • 3/8" to 5mm Couple
  • Flex Sections Machined to Allow Flexibility


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