GPH 346 Main Blade Holder Replacement - HI0403210 by Hirobo  [HI0403210]

Direct replacement main blade holder for GPH 346

This replacement main blade holder is a component-level option identified by Hirobo model HI0403210 and specified for GPH 346 fitment. In RC helicopter setups it secures the main rotor blade to the rotor head and contributes to blade retention, sweep stability, and basic rotor balancing.

Installation guidance highlights fit and basic function: make sure the part seats squarely in the rotor hub, confirm retention points engage without lateral play, and rotate the rotor slowly to verify a clean blade sweep and consistent tracking. After fitting, check at low rpm and then in incremental power steps up to normal operating speed to detect any vibration or binding.

For routine tuning the main blade holder influences blade alignment and the way pitch inputs transfer to the blades, so inspect it when tracking drift or intermittent vibration appears. Regular checks of mounting faces and fastener security will help maintain predictable flight behavior.