Hirobo HI2500078 Ball Bearing Pair 8 x 12 x 3.5 mm  [HI2500078]

Precision bearings for Hirobo helicopter assemblies

This RC-scale accessory is a matched pair of ball bearings designated HI2500078, supplied as 2 pcs with dimensions 8 x 12 x 3.5 mm. They are suitable for use in Hirobo helicopter general parts and other small RC models where compact bearings are needed to support rotation.

When fitting, make sure housings and shafts are clean and correctly aligned to prevent unwanted play. Verify the bearing seats and shaft fit before final assembly, and always replace bearings in matched pairs when servicing rotor heads, small gear trains, or other rotating units to preserve smooth operation and predictable tuning.

This item is offered as an RC-scale replacement part for model maintenance and tuning tasks only.