Hirobo HI2521129 COLLAR 3 x 8 x 3 - Collar for helicopter general parts  [HI2521129]

Collar for helicopter assemblies

This Hirobo HI2521129 collar is an RC-scale accessory sized 3 x 8 x 3 designed as a general collar component for helicopter assemblies. It serves as a simple locating sleeve to maintain axial spacing on small shafts and linkages inside model helicopters and related rotating subassemblies.

Installation is straightforward: slide the collar onto the shaft to the required position and secure adjacent hardware according to the airframe's assembly method. The collar's role is primarily positional rather than load-bearing, so confirm fit and alignment with the mating shaft or bushing to avoid binding.

For tuning and maintenance, check the collar for signs of wear or radial play during routine inspections, especially after hard flights or impacts. If any deformation or looseness appears, replace the collar to preserve control linkage geometry and consistent rotor tracking.