Hirobo HI2525003 Ball Stay D5mm H=5 Replacement for RC Helicopters  [HI2525003]

Ball seat component for rotor linkages

This Hirobo HI2525003 D5mm ball stay H=5 is an aftermarket linkage part used in small helicopter control assemblies. It provides a fixed seating location for ball links so pivot geometry remains stable across cycles of motion. Confirm the D5mm bore and the H=5 height before assuming compatibility with other components.

Fitment approach: inspect the mating ball or socket, position the stay so the load is centered, and verify full travel without lateral interference. As the piece is small, rely on measured dimensions rather than model compatibility lists.

Role during setup: replacing a degraded stay restores seating integrity and can prevent gradual control degradation due to worn pivots, keeping trims and rates consistent in everyday flying.