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

SX Bearing Holder Summary

This replacement pack supplies SX-series bearing holders intended as routine service parts for Hirobo Eagle, Freya, EX and SX model helicopters. It is provided as an accessory kit for RC-scale helicopter maintenance and repair rather than for full-size aircraft.

The holder components secure and locate ball bearings in the rotor and drive geometry, helping preserve alignment after disassembly or during rebuilds. Replacing worn holders helps maintain shaft concentricity and reduces play that can affect rotor tracking and flight responsiveness.

Fitment notes: confirm the SX designation and match the HI0404511 part number against your model parts list before installation, verify bearing sizes and shaft interfaces, and use correct fasteners and thread locking suited to model-scale assemblies. Check clearances after assembly and perform a low-speed ground spin test to confirm smooth operation before flight.