Hirobo HI2521144 Collar 2.6 x 3 x 2.9 Replacement Part  [HI2521144]

Replacement collar for correct shaft seating

This collar is an RC-scale replacement part intended for use in Hirobo helicopter general parts assemblies. It provides positioning and retention where a precise dimensional fit is necessary on shafts or within hubs. The component functions as a small spacer for assembly and alignment tasks and is not designed as a primary structural member.

For installation, experienced hobby technicians should slide the collar into the designated location on the shaft or into the mating bore, align axially, then secure surrounding fasteners following the original assembly guidance. After fitting, check rotation and axial play to confirm the collar seats properly.

When replacing or swapping rotor components, this collar supports consistent shaft positioning which aids component interchangeability and trim repeatability. Inspect the collar during scheduled maintenance and verify fit before any flight operations.