Hirobo HI2521092 Collar 5 x 13 x 16 — Collar for Hirobo helicopter parts  [HI2521092]

Collar for helicopter assemblies

This collar is an RC-scale accessory intended for use within Hirobo helicopter general parts. The product name encodes its working dimensions, 5 x 13 x 16, which guide fit and clearance considerations when placed on shafts or within assemblies.

Installation is straightforward for experienced model technicians: the collar acts as a spacer or locator between rotating elements and fixed housings, helping to maintain axial position and consistent clearance. Verify shaft diameter and internal bore before fitting to ensure a secure seating without forcing the part.

In tuning or maintenance contexts the collar is useful where small changes in axial spacing affect rotor balance or linkage geometry; changing or shimming collars of matching dimensions is a practical way to fine-tune component alignment without altering primary parts.