Hirobo HI2500095 Shielded Ball Bearings 4x11x4 mm, 2 pcs  [HI2500095]

Compact shielded ball bearings 4x11x4 mm (2 pcs)

The Hirobo HI2500095 set contains two shielded ball bearings sized 4 x 11 x 4 mm and marked as part code #694ZZ for sealed construction. Made as a direct replacement for small RC drivetrains, rotor hubs and other tight-fit precision locations, these low-profile bearings provide sealed protection in compact assemblies.

These bearings reduce friction in rotating parts and are a simple way to recover smooth operation when an original bearing becomes noisy or develops play. During installation, ensure the bearing sits squarely in its bore and that the mating shaft is clean and undamaged; verify both axial and radial play after fitting to confirm correct seating.

Maintenance note: the shielded #694ZZ design helps resist light contamination, but routine inspection and timely replacement when wear appears will help keep drivetrain efficiency and consistent performance. Use model number HI2500095 or #694ZZ when sourcing identical replacements.