Hirobo HI2521060 2 x 3 x 1.2 RC Shaft Collar for Helicopters  [HI2521060]

RC shaft collar for Hirobo helicopter models

The HIROBO HI2521060 collar is a small-scale shaft collar intended for use on Hirobo helicopter models. The 2 x 3 x 1.2 marking identifies the collar's nominal dimensions, which are used to position and retain small shafts and linkage rods within assemblies.

As a locating device the collar prevents axial shift and keeps servos, bellcranks, and rotating shafts correctly indexed. Being an accessory-level component, its purpose is to reduce unwanted axial play and help preserve the model's geometry during tuning and minor maintenance.

To fit the collar, slide it onto the shaft to the required position, align any mating components, then secure with the model's set screw or fastening method. Avoid excessive torque on the fastener to prevent damage to the shaft surface, and confirm runout after installation where tight tolerances are needed for rotor or tail systems.

The collar is intended solely for model repairs and adjustments and is supplied as an RC accessory part.