This is a pair of flanged ball bearings sized 2 x 5 x 2.3 mm supplied for RC-scale use, sold as 2 pcs. The part is intended for Hirobo helicopter components and other small RC linkages where a low-profile, flanged bearing helps keep axial position without additional retaining hardware.
Installation notes: remove the worn bearing, verify the bore is clean and free of debris, and press the new bearing squarely into position until the flange seats flush with the housing. Check smooth rotation before reassembly and avoid applying side loads while fitting to preserve bearing life.
Tuning and maintenance role: use these bearings where precise shaft location and minimal axial play are required, such as rotor linkages, tail assemblies, or compact gearbox supports on small RC models. Regular inspection and light lubrication appropriate for model bearings will extend service life.
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