Hirobo HI2521070 Collar 3 x 7 x 14 RC Helicopter Shaft Spacer  [HI2521070]

Precision Collar for Model Helicopters

This Hirobo collar is supplied as a small alignment component for RC-scale helicopter assemblies where accurate axial positioning of shafts or linkages is required. The 3 x 7 x 14 marking in the product name denotes the collar's measurements used to match miniature shafts and pins commonly found in model helicopters.

In practical use the collar helps retain component indexing and alignment, aiding routine setup adjustments and minor tuning. It is intended for model-scale applications and functions as a mechanical spacer or locator within rotor link, shaft, or gear-stack areas where correct placement reduces unwanted play.

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