SX Series Tail Drive Shaft for Autorotation - Hirobo HI0404513  [HI0404513]

Component Summary for SX Series Shaft

The HI0404513 shaft is a replacement autorotation component for Hirobo SX series helicopters, designed to carry rotational force between the rotor autorotation assembly and the tail drive system in RC use.

Fitment and role: this shaft couples the autorotation mechanics to the tail drive path. When installing, verify the mating splines and bearing seats to ensure correct engagement and smooth operation.

Installation notes: always disconnect power and secure the helicopter frame before removing the old shaft. Slide the new shaft into bearings straightened to avoid side load, confirm free rotation, and secure fasteners to specification to prevent distortion.

Tuning and maintenance: while the shaft alone does not change core flight behavior, correct alignment and bearing condition influence autorotation response and tail control; recheck tail tracking and rotor endplay after fitting.