Hirobo HI2521070 3x7x14 RC Helicopter Collar - Shaft Locator  [HI2521070]

Small Collar for Model Helicopters

This Hirobo collar is supplied as a compact alignment part for RC-scale helicopter assemblies where small axial positioning of shafts or linkages is required. The 3 x 7 x 14 dimension noted in the name defines the collar size for pairing with miniature shafts and pins commonly used in model helicopters.

In service, the collar helps keep parts indexed and aligned, making routine setup and minor tuning simpler. It is intended for model-scale use and acts as a mechanical spacer or locator inside rotorlink, shaft or gear-stack zones to reduce unwanted play.

Fitting is straightforward for competent model builders: position the collar at the required point on the shaft or pin, check clearances with nearby parts, and secure it using the model's recommended retention method. When replacing a worn collar, inspect mating surfaces for damage and ensure it seats concentrically to avoid adding vibration during operation.