Hirobo HI2521108 Collar 3 x 4 x 5.1 for Hirobo Helicopter General Parts  [HI2521108]

Shaft collar for Hirobo helicopters

This Hirobo HI2521108 collar is a small-scale RC accessory intended for use within Hirobo helicopter general parts. It functions as a shaft collar to hold components in axial position on model helicopter shafts, helping maintain alignment between rotating parts and nearby assemblies.

Installation is straightforward: the collar is seated on the shaft at the required position and secured to prevent axial movement. In most setups it is used where a compact, repeatable stop is needed between bearings, gears, or other hub elements. Treat the part as an RC-scale component and check fitment before committing to any modifications.

When tuning rotorhead or tail assemblies, shaft collars like this one are useful for locking small positional adjustments and preserving trim between flights. Regular inspection for wear and secure fastening will help keep the assembly stable during flight cycles.