Hirobo HI2500117 2 x 5 x 2.5 mm Ball Bearing Pack of 2  [HI2500117]

Hirobo Bearing Specification Summary

The HI2500117 is an RC-scale ball bearing supplied in pairs and identified by part code #52ZZ. It is meant for replacement in compact rotating assemblies where the measured 2 x 5 x 2.5 mm profile is required.

These bearings function to support rotating shafts and limit friction between mating components in rotor linkages and small drive shafts. A single identical replacement bearing can recover smooth rotation and reduce unwanted vibration caused by bearing wear.

Installation guidance: check the shaft diameter and clearance before pressing the bearing into place, make sure the bearing is squarely seated on the journal, and verify there is no excessive endplay or radial runout after fitting. Do not install on a badly scored or misformed shaft without proper rework, and inspect adjoining parts for wear that might shorten service life.

Compatibility: listed under Hirobo helicopter general parts and intended where a 2 x 5 x 2.5 mm bearing specified by HI2500117 or #52ZZ is required.