Hirobo HI2500094 Flanged Bearing Pack, 4 x 7 x 2.5 mm (2 pcs)  [HI2500094]

Why choose a flanged ball bearing?

This Hirobo HI2500094 flanged ball bearing is presented as a two-piece replacement set, each unit sized 4 x 7 x 2.5 mm. The flange acts as a built-in locating face, which simplifies assembly in tight linkages, bulkheads, and small rotating mechanisms common to model helicopters and similar RC models.

In practical terms, the bearing reduces friction on rotating shafts while the flange constrains lateral movement. For best results, verify the inner and outer diameters on the mating parts before fitting and keep flange orientation consistent with the original component to maintain proper alignment.

Service guidance: remove contaminants with a low-residue solvent, then add a small amount of light bearing oil or a thin grease formulated for RC parts. Avoid heavy packing with grease that raises drag. Replace bearings that show roughness or freeplay during rotation.