Propeller Shaft M3 for OMA-28 Motor OS74004061 by O.S. Engine  [OS74004061]

Product synopsis: prop shaft

This O.S. Engine propeller shaft set is designed specifically for OMA-28 motor couplings and M3 threaded shafts. The component functions as the motor output shaft/propeller coupling, providing the mechanical link between the motor and a prop or driveline part on RC aircraft and similar builds.

Its purpose is to retain the propeller while maintaining axial alignment. When swapping a worn shaft or changing prop mounting, ensure correct thread engagement and concentric seating; the M3 thread size is the key interface to verify.

Installation tips: check that the motor and prop hub are compatible with OMA-28 and M3 dimensions, begin the thread by hand to prevent cross-threading, and fasten with steady control. After fitting, inspect propeller runout to confirm balance and smooth driveline rotation before operation.

Care and tuning: look for signs of wear, corrosion, or bending before reusing the shaft, and keep connection surfaces clean. If new vibration appears after installation, review shaft and prop seating to reestablish correct alignment.