Motor works but blade not spinning

Check and make sure that the shaft in the base housing spins. If it does, the blade assembly has become disconnected from it's shaft probably due to an improper spot weld or peening of the blades to the shaft, or has torn loose or ripped the splines out due to an immovable object trying to be spun. A jammed ice cube can do this. Blade assemblies can be had usually directly through the manufacturer and usually on line. If this has helped, please rate it accordingly.