Hirobo SX Bearing Holder Set HI0404511 for Eagle, Freya, EX and SX Helicopters  [HI0404511]

Overview of SX Bearing Holders

This replacement set contains SX-series bearing holders produced as common service parts for Hirobo Eagle, Freya, EX and SX model helicopters. It is supplied as an accessory for RC-scale helicopter maintenance and overhaul tasks, not for use on full-size aircraft.

The holder set's function is to retain and locate ball bearings within the rotor and drive layout, which helps keep alignment intact during rebuilds or after disassembly. Swapping worn holders preserves shaft concentricity and cuts down on unwanted play that can upset rotor tracking and control feel.

Fitment notes: verify the SX designation and match the HI0404511 part number with your parts list prior to fitting, confirm bearing dimensions and shaft interfaces, and fit using the correct screws and thread-locking practices suitable for model assemblies. After assembly, check operating clearances and run a low-throttle ground spin to confirm smooth rotation before flight.