HI2521124 Collar for Helicopter Shafts 12 x 15.9 x 6.8 by Hirobo  [HI2521124]

Helicopter shaft spacing collar overview

This collar, identified as HI2521124, provides a 12 x 15.9 x 6.8mm spacing solution for RC helicopter shafts and housings to assist correct assembly fit.

It serves as an axial spacer and positional guide inside rotor hubs and transmission stacks, preserving concentricity and controlling axial clearance between mating parts.

Assembly advice: slide the collar into position on the shaft, confirm seating against adjoining parts, inspect for wear or ovality before reuse, and adhere to the model's original assembly practice when securing the part.