Hirobo HI2500078 Precision Ball Bearings 8 x 12 x 3.5 mm, Pair  [HI2500078]

Upgrade and tuning considerations

This RC-scale spare comprises two ball bearings listed as HI2500078, supplied as 2 pcs with nominal dimensions 8 x 12 x 3.5 mm. They are suitable for Hirobo helicopter general parts and compact RC models where small bearings support spinning components.

When upgrading or repairing, fit bearings with clean mating surfaces and correct shaft alignment to avoid excess play. Confirm fit on both shaft and bore before final assembly, and renew bearings in matched pairs when servicing rotor heads or small gear trains to preserve smoothness and consistent tuning response.

This product is intended for use as an RC replacement component for model maintenance and tuning purposes only.