Hirobo HI2521108 3 x 4 x 5.1 Collar for Model Helicopter Shafts  [HI2521108]

Shaft positioning collar overview

This Hirobo HI2521108 collar is a small-scale RC component intended for application within Hirobo helicopter general parts. It serves as a shaft collar to hold components in axial position on model shafts, maintaining alignment between rotating parts and nearby assemblies.

To fit the collar, seat it on the shaft where required and secure it so axial movement is stopped. In many layouts it acts as a compact, repeatable stop between bearings, gears or other hub elements; always test fit before modifying parts.

When setting up rotorhead or tail linkages, collars of this type lock fine adjustments and help preserve trim through multiple flights. Regular checks for wear and tight fastening will support consistent, stable operation.