Hirobo HI0412328 SDX SCEADU SZ-V Pitch Arm  [HI0412328]

Pitch arm for Sceadu SZ-V helicopters

This pitch arm is a direct-replacement RC-scale accessory intended for the Hirobo SDX Sceadu SZ-V rotor head assemblies. It functions as the mechanical link between the swash/rotor head and the blade pitch mechanism, helping translate servo input into blade angle changes.

Installation notes: this part installs in-line with existing rotor head linkages and should be checked for correct fitment on the Sceadu SZ-V mounting points before final tightening. Verify alignment with the swashplate and ensure linkages move freely without binding; minimal trimming of thread length on link screws may be required for clean travel.

Tuning role: the arm affects cyclic responsiveness and pitch symmetry, so pairing a correctly centered arm with balanced blades and well-seated ball bearings supports neutral hover and consistent cyclic feel. Inspect mating hardware and bearings during replacement to avoid introducing play or binding into the control path.