Hirobo HI2500092 2 x 5 x 2 mm open ball bearings, 2 pcs for RC helicopter assemblies  [HI2500092]

Micro 2x5x2mm open bearings for small rotorheads

This Hirobo HI2500092 set contains two open type ball bearings sized 2 x 5 x 2 mm, supplied as a pair for routine replacement in small-scale RC helicopter assemblies. The open construction exposes the balls and raceways, making the bearings suitable for locations where you need to inspect grease or clear debris quickly.

Compatibility is focused on general Hirobo helicopter parts and small RC drivetrains and gear assemblies where 2 x 5 x 2 mm bearings are specified. Confirm fit by matching bore and outer diameter dimensions before installation.

Installation notes: clean the housing and shaft, press the bearing squarely into place with low force, and avoid applying pressure to the balls or seals. Open bearings accept light lubrication; use a fine applicator to add small amounts of bearing oil or light grease appropriate for miniature RC components.

Tuning and maintenance role: these bearings reduce friction at rotor pivots and gearbox interfaces, contributing to smoother rotation and reduced wear on pinions and spurs. Replace bearings in pairs when wear is visible to maintain balanced performance.