Hirobo HI0404506 SX Damper Collar  [HI0404506]

SX Damper Collar

This Hirobo HI0404506 damper collar is an RC-scale replacement part intended for the common damper assemblies used across Eagle, Freya, EX and SX helicopter models. It functions as the retaining piece that locates and secures the damper shaft within the shock assembly, helping maintain alignment and consistent damper response during flight.

Made as a compact mechanical component, the collar's role is primarily mechanical rather than electronic, so inspection focuses on fit and wear rather than electrical compatibility. When servicing the damper assembly, verify that the collar seats flush against the damper housing, there is no lateral play on the shaft, and the retaining method used in the original assembly is followed to prevent loosening in use.

For tuning, the collar is part of the damping stack that influences how the assembly compresses and rebounds; replacing a worn collar or ensuring correct seating can improve repeatability when adjusting damper oil weight or spring preload. As with any small RC part, keep spare collars on hand for quick repairs during practice or events.