5mm to 8mm Precision Flex Shaft Coupling
Precision Machined Aluminum Flex Coupling - 5mm to 8mm
These are simply the best shaft couplers on the market today. They couple a 5mm shaft (ie, your NEMA 17 motor) to an 8mm rod (your Z-screws) providing concentric movement (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.