Hirobo HI2500117 2 x 5 x 2.5 mm Replacement Ball Bearing 2 pcs  [HI2500117]

Replacement Bearing Details

The HI2500117 bearing is an RC spare part sold in packs of two and catalogued under #52ZZ. It suits applications where compact 2 x 5 x 2.5 mm bearings are required to replace worn components in tight rotating mechanisms.

These bearings support rotary shafts and decrease friction between mating parts found in rotor linkages and small gearbox shafts. Swapping out a worn bearing for the same type typically restores rotational smoothness and reduces vibration from looseness or surface roughness.

Fitment advice: verify exact shaft diameter and bearing fit before pressing, ensure the bearing is aligned and seated fully on the journal, and check for both endplay and radial runout after installation. Do not force the bearing onto a damaged shaft, and review adjacent components for wear which could curtail bearing lifespan.

Compatibility: this item appears under Hirobo helicopter general parts and is intended for use where the HI2500117 or #52ZZ 2 x 5 x 2.5 mm bearing is specified.