The Hirobo HI0404548 bearing holder is intended as a compact spare for SX 17S gear assemblies found in Eagle, Freya, EX and SX model lines. It provides a secure seat for a 19mm bearing and helps preserve alignment under routine flying loads.
When fitted the holder acts as the locating point for the bearing and shaft, reducing endplay in the drivetrain. Accurate seating and tight fixation reduce variation in pitch, yaw and collective settings when you perform setup or maintenance.
Fitting is a standard workshop task for those experienced with Hirobo airframes: remove the cover or subframe, clean the mating surfaces, replace the holder and confirm the bearing is seated correctly and the shaft runs true before reassembly. Complete a control sweep and quick rotor spin to verify no binding is present.
Select the HI0404548 holder when worn bearing seats need replacement or when restoring precise transmission alignment on compatible Hirobo models; always confirm orientation and fit during service to retain consistent control feel.
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