O.S. Engine OS74004061 M3 Propeller Shaft Compatible with OMA-28  [OS74004061]

Technical outline of shaft set

The O.S. Engine propeller shaft set fits OMA-28 motor interfaces and accepts M3 threaded fittings. It is a motor shaft and prop coupling designed to transmit the motor output to a prop or driveline element on model aircraft and related RC projects.

The component's role is to hold the propeller while preserving axial alignment. When replacing a fatigued shaft or adjusting prop mounting, make sure thread engagement is correct and the shaft runs concentric; the M3 thread designation is the interface standard to check.

Fitting guidance: verify that your motor and prop hub correspond to OMA-28 and M3 dimensions, hand-start threads to avoid cross-threading, and secure the assembly with steady, controlled tightening. After installation, assess propeller runout to confirm balance and reduce driveline vibration before use.

Upkeep and tuning: check the shaft for wear, rust, or distortion before reuse, and maintain clean mating surfaces. If imbalance or vibration occurs, re-evaluate shaft seating and prop installation to recover proper alignment.