Replacement Ball Bearings 2x5x2.3 mm HI2500098 by Hirobo 682ZZ (2 pcs)  [HI2500098]

Micro 2 x 5 x 2.3 mm bearings for model shafts

The bearings shown are listed under Hirobo part HI2500098 with the 682ZZ shielded classification. Each bearing measures 2 x 5 x 2.3 mm and is intended for compact RC applications where space is limited and shaft alignment must be precise.

They serve as direct swap-in replacements for worn components in tail booms, small gear stacks, and similar tight-tolerance locations on helicopters and other micro models. The shields help keep grit out while allowing efficient rotation.

For best results, check that the inner bore fits a 2 mm shaft and that the mounting seat matches the 5 mm outer diameter. Prepare mating surfaces, fit the bearings squarely, and manually rotate the assembly to confirm smooth operation before completing reassembly. These steps reflect common model maintenance practice.