Flexible shaft coupler 5mm-5mm

Those are used to connect shaft or lead screw to stepper motor. Mostly used in 3dprinters and CNC. Helical (spiral) compliant construction of this coupler allows absorption of parallel or angular misalignment and shaft end-play by spring action.Please remember, when used in vertical arrangement (Z axis) helix will sag due to gravity and rest on parallel surfaces of end of shafts and lead screw or helix itself cancelling capacity to compensate angular misalignment.We recommend putting small bearing ball between shaftsColor: SilverType: Flexible Shaft CouplingMaterial: Aluminium AlloyUse set screw to fasten coupler to shaft, 2 set screws at each shaftInner Diameter: 5mm x 5mmOutside Diameter: 19mmLength: 25mm