HIROBO HI2521058 4 x 6 x 5 Positioning Collar for RC Helicopter Use  [HI2521058]

Helicopter collar for precise axial positioning

The HIROBO collar marked HI2521058 and sized 4 x 6 x 5 is intended for HIROBO helicopter assemblies where small positioning collars or spacers are required to control component locations.

It functions as a locating collar to establish axial position and provide clearance control for rotor parts and linkages. Normally it is placed on the shaft or inside a linkage bore to ensure repeatable spacing; final locking or retention should follow the kit or service manual instructions.

Before flight, confirm the 4 x 6 x 5 measurements match the mating shaft or bore, check for correct alignment and free rotation, and ensure there is no binding. This component is supplied as a direct replacement or routine maintenance item within HIROBO parts.