Hirobo HI2500074 4 x 7 x 2 mm Flanged Bearings (open) - 2 pieces  [HI2500074]

Performance-oriented flanged bearing for small RC joints

This Hirobo kit provides two flanged, open ball bearings sized 4 x 7 x 2 mm for use in compact RC mechanisms. The flange helps lock the bearing into shallow seats where standard bearings would be hard to retain.

Practical notes: because the face is open, you can quickly check for wear and apply a light lubricant during tuning sessions. Keep them away from heavy contamination and consider shields only if debris is a problem.

Setup tips: when fitting, press the flange evenly into its seat and verify there is no binding. Fresh bearings often reduce measurable play, which in turn sharpens small control inputs and improves the feel of delicate adjustments.