Aluminum flexible coupling - Size of flexible coupling: 5 mm x 8 mm

This basic flex coupling connects the motor to the shaft while eliminating misalignment..Minimum backlash is another great advantage of this aluminum flex coupling. This 19mm OD and 25mm length flex coupling is machined from aluminum. Bore Diameter according to the selected variant. A flexible coupling with a diameter of 5 mm is suitable for NEMA 17 motors and a coupling with a diameter of 6.35 mm for NEMA 27 motors. However, please check this information on your engine or its datasheet. Flexible couplings contain worms for tightening to the shaft.