Hirobo HI2521089 Collar 5 x 6.5 x 15 Shaft Locator  [HI2521089]

Precision collar for RC helicopters

This Hirobo collar is an RC-scale helicopter general part defined by its 5 x 6.5 x 15 sizing, intended for shaft positioning and alignment tasks in model helicopters. It serves as a small mechanical spacer or locating ring that helps maintain axial position where a matching bore and shaft diameter are used.

Model builders use collars like this to limit lateral play, register rotating parts on a shaft, and provide a simple datum during assembly and setup. Because mounting methods and fastening hardware vary, always confirm shaft diameter and mating-part clearances before fitting.

As an RC accessory, this collar is a precision-sized component for assembly, maintenance and fine-tuning of helicopter drivetrains and tail or rotor linkages, and is not intended for full-scale applications.