Hirobo HI2521070 Collar 3 x 7 x 14 RC helicopter collar part  [HI2521070]

Collar for RC Helicopters

This Hirobo collar is presented as a compact alignment accessory for RC-scale helicopter assemblies where small axial positioning of shafts or linkages is required. The 3 x 7 x 14 marking in the product name describes its size reference used for selecting the correct fit on miniature shafts and pins commonly found in model helicopters.

In practical use the collar helps keep components indexed and aligned, assisting routine adjustment and minor tuning tasks during setup. It is intended for model-scale applications only and works as a mechanical spacer or locator within rotorlink, shaft or gear-stack areas where precise placement reduces unwanted play.

Installation is straightforward for experienced model builders: position the collar at the required location on the shaft or pin, verify clearance against adjacent parts, and secure it by the model's intended retention method. When replacing a worn collar, check mating surfaces for burrs or wear and ensure concentric seating to avoid introducing vibration during flight.