Precision RC Helicopter Shaft Collar 5 x 7 x 5 - Hirobo HI2521110  [HI2521110]

Precision shaft collar for model helicopters

This Hirobo HI2521110 collar is an RC-scale accessory sized 5 x 7 x 5 for fitting to model helicopter shafts and linkages. It acts as a locating collar to hold components at a set position along a shaft, helping preserve alignment in the rotor and tail assemblies.

Installation is simple: slide the collar to the required location on the shaft and secure it using the model's existing retaining method or an appropriate compatible fastener. As the collar primarily locates parts rather than bearing heavy loads, ensure it seats squarely against mating surfaces to prevent axial play.

During setup and tuning, collars like this are useful for setting travel limits, establishing trim reference points, and restoring concentric alignment after parts replacement. Include a check of the collar seating as part of your regular pre-flight inspection routine.