Precision Collar 3 x 7 x 14 Hirobo HI2521070 for RC Helicopters  [HI2521070]

Compact Alignment Collar

This Hirobo collar is described as a compact alignment accessory for RC-scale helicopter assemblies where fine axial placement of shafts or linkages is important. The 3 x 7 x 14 notation in the product name indicates the collar size used to select the correct fit on small shafts and pins commonly found in model helicopters.

Practically, the collar helps keep components indexed and aligned and supports routine adjustment and light tuning work during setup. It is designed for model-scale applications and serves as a mechanical spacer or locator within rotorlink, shaft or gear-stack areas to reduce unwanted play.

Installation is straightforward for experienced modelers: slide the collar to the required location on the shaft or pin, confirm clearance against adjacent parts, and fix it using 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 in flight.