CNC-SC-8X8R CNC Motor Shaft Coupler 22x14mm Rigid Steel #45 Couplings.
For hobbyists, CNC couplings are used to connect the stepper motor axis and the leadscrew/set-screw. The rigid CNC motor coupling is a 90 degree fastening design and is fastened by four M4 set screws.
Aperture size (end to end): 8x8mm.Aperture tolerance is 0.03 mm.