Hirobo HI2500074 Flanged Ball Bearing 4 x 7 x 2 mm (open) 2 pcs  [HI2500074]

Flanged ball bearing for RC linkages

This HIROBO ball bearing set contains 2 pcs of flanged, open-type bearings sized 4 x 7 x 2 mm designed for RC-scale use. The compact flange helps locate the bearing in shallow housings and small bearing seats commonly found in model helicopters and other light RC assemblies.

Use notes: the open-type face allows visual inspection and straightforward light lubrication during routine maintenance, but also exposes the bearing to dust so place it where contamination is minimal. Typical placements include small shafts, linkages, swashplate link points, and other low-load rotating interfaces where space is limited.

Installation tips: press the flange gently into a matching seat to avoid distorting the inner race, verify axial alignment after assembly, and check for free rotation without binding before final reassembly. For tuning: replacing worn bearings can reduce play in control linkages and improve responsiveness of small cyclic inputs.