28mm Spinner for 2.3mm shaft & 4mm prop hole

28mm Spinner for 2.3mm shaft & 4mm prop hole

These are not only spinners but are also hubs that attach regular glow engine non-folding type airplane props to electric motor shafts. A set screw in the hub holds it to the motor shaft. The machined aluminum hubs and glass-filled nylon spinners run absolutely true at high RPM's and eliminate that "buzz" that happens with out-of-round and out-of-balance spinners which cuts your motor speed.