HI0403210 Main Blade Holder for GPH 346 by Hirobo  [HI0403210]

Replacement main blade holder compatible with GPH 346

This spare main blade holder carries the Hirobo designation HI0403210 and is intended for GPH 346 fitment. It performs the essential role of clamping the main rotor blade to the rotor head, helping preserve blade retention, consistent sweep, and straightforward rotor balance.

When fitting focus on correct seating and secure retention: verify that the holder locates fully in the hub, check alignment of blade retention points, and manually cycle the rotor to confirm smooth blade travel and repeatable tracking. Once fitted, step through low-to-normal rpm checks to detect any unusual vibration early.

From a service perspective the holder affects blade alignment and pitch transfer, so inspect it when tracking issues or sudden vibration are reported. Regularly check the mounting faces for wear and keep fasteners tight to maintain consistent flight characteristics.