Hirobo GPH 346 Spindle Bush HI0403205  [HI0403205]

Rotorhead Spindle Bush for GPH 346

This Hirobo spindle bush is supplied as a direct replacement option for the GPH 346 spindle assembly used in RC rotorheads. It serves as a wearable support that restores correct running clearance where the original bushing has worn, focusing on maintenance and tuning rather than material claims.

Fitting is best carried out by experienced model technicians: remove the degraded bushing, inspect nearby bearings and shaft surfaces for wear, and press the replacement into the housing while keeping alignment to preserve concentricity. Proper seating helps maintain rotor balance and consistent behaviour during setup.

In tuning, a renewed spindle bush reduces axial play and improves repeatability of pitch and cyclic adjustments. Incorporate this part into routine rotorhead maintenance to maintain geometry and reduce trimming iterations during test flights. This product is for RC models only and not for full scale aircraft.