2 x 5 x 2 mm open ball bearing pair Hirobo HI2500092 for small RC helicopter and gearbox use  [HI2500092]

Precision 2x5x2mm open bearings for mini helicopters

This Hirobo HI2500092 pack includes two open ball bearings sized 2 x 5 x 2 mm, intended for regular servicing and minor repairs in small RC helicopter mechanics. The exposed raceways make it easier to monitor condition and apply lubricant sparingly.

These bearings suit general Hirobo helicopter components and tiny drivetrains where the 2 x 5 x 2 mm form factor is required. Always double-check inner bore and outer diameter to ensure proper seating.

Fitment advice: prepare the bore and shaft by removing dirt and light corrosion, then press the bearing straight into place with gentle, even pressure. Because they are open, apply light bearing oil with a pinpoint applicator if lubrication is necessary.

Performance role: replacing worn bearings restores smooth pivot action at rotor points and reduces friction in gearbox interfaces. Swap both bearings in a worn set to prevent imbalance and uneven wear.