Hirobo HI0412294 SDX FZ-V Rotor Stack Spacer for Precise Blade Spacing  [HI0412294]

Purpose and Fit for SDX FZ-V

The HI0412294 from Hirobo is a compact spacer intended for SDX FZ-V rotor assemblies to control axial position and gap between rotor blades. As a basic spacer element, it supports consistent blade spacing and helps produce repeatable alignment when assembling or maintaining the rotor head.

Install this spacer where the original blade stack requires an intermediate shim to adjust pitch stack height or remove side play. The component plays a passive mechanical role that contributes to steady blade geometry and can affect trim and rotor balance in scale RC helicopter setups.

To install, separate the blade hub to expose the blade stack, insert the spacer at the required point, then reassemble and check blade track and pitch symmetry. Perform a low-speed rotor check to confirm correct seating and clearance before normal use.