Blue Hirobo HI2521098 3 x 8 x 2 RC Shaft Collar  [HI2521098]

Blue 3 x 8 x 2 collar for model rotors

This Hirobo HI2521098 collar comes in a blue finish and is marked 3 x 8 x 2, representing a compact shaft collar for model helicopter use. It is intended to provide precise axial location for shafts and small linkages in hobby assemblies.

Fit guidance: the bore accepts a 3mm shaft, the outer dimension is roughly 8mm and the width is 2mm, making the collar suitable for retaining gears, spacers or linkage parts on rotor and tail shafts. The coloured finish helps confirm correct placement during build or servicing.

Practical use: place the collar at the required axial position on the shaft and fix according to the collar's fastening arrangement. Collars of this type act as straightforward mechanical stops that help preserve trim settings and limit undesired axial movement without disturbing bearing seating.