This is an RC-scale flanged ball bearing supplied as a set of 2 pcs sized 6 x 12 x 4 mm intended for general helicopter parts and similar small model mechanisms. The flange on the outer race provides an integrated locating surface that helps control axial movement and keeps the bearing seated in shallow housings.
Use this bearing where compact axial location is needed, for example in small rotor hubs, gearboxes, or idler positions where a dedicated flange simplifies retention. Check the housing for burrs and confirm the flange seats flat against the mounting face before final assembly to avoid misalignment.
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