The Hirobo HI0404548 bearing holder is a compact replacement designed for SX 17S gear assemblies on Eagle, Freya, EX and SX airframes. It secures a 19mm bearing seat within the rotor and tail geometry to help maintain alignment under normal flight loads.
In service the component provides a precise locating and support point for the shaft and bearing it houses. Proper seating and secure fixation reduce transmission play and make pitch, yaw and collective adjustments more repeatable during setup and tuning.
Installation is straightforward for technicians familiar with Hirobo airframes: remove the affected cover or subframe, inspect mating surfaces for wear, fit the replacement holder and verify bearing seating and shaft runout before reassembly. After installation, perform a basic preflight check to confirm there is no binding and that linkages move smoothly through their full travel.
Use this HI0404548 bearing holder when renewing worn bearing seats or restoring tight transmission alignment on compatible Hirobo helicopter frames; verify fit and bearing orientation during service to maintain predictable flight control response.
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