Hirobo HI2500092 Open 2 x 5 x 2 mm Ball Bearings (2 pcs) for RC helicopter and small drivetrain fittings  [HI2500092]

Compact open 2x5x2mm bearings for micro rotor and gear assemblies

This Hirobo HI2500092 set supplies two open type 2 x 5 x 2 mm ball bearings for routine replacement in compact RC helicopter mechanisms. Their open design exposes the rolling elements to allow quick checks and spot lubrication when required.

Intended for general Hirobo helicopter parts and other small-scale drivetrains that call for 2 x 5 x 2 mm bearings. Always confirm the bore and outer diameter measurements before pressing bearings into service.

Fitment tips: remove contaminants from shafts and housings, align the bearing squarely, and apply even pressure during installation. Open bearings accept small amounts of light oil; use a precision applicator to avoid contamination.

Maintenance impact: installing fresh bearings improves rotational smoothness at rotor pivots and decreases wear on pinions and spur gears. For balanced operation, replace worn bearings in matched pairs.