Hirobo HI2500046 6x12x4 mm Ball Bearings 2 pcs  [HI2500046]

Compatibility and service notes for 6x12x4 bearings

The Hirobo HI2500046 ball bearing is supplied as a 2-piece replacement intended for general RC helicopter parts maintenance. It serves as a compact bearing choice where consistent rotation and low friction are required on small shafts, pinions, and gearbox interfaces.

In use these bearings reduce rotational drag at bearing seats, handle axial and radial loads present in typical helicopter linkages, and assist in maintaining predictable rotor and gear mesh performance. Correct fitment supports stable servo feedback and drivetrain repeatability during setup and adjustment.

Installation notes: verify shaft and bore dimensions before fitting, use a proper press or evenly applied force to seat the bearing, avoid direct hammer blows to the races, and confirm endplay and preload according to the model's service guidance. Light lubrication and routine inspections for wear or corrosion will improve longevity.

Service guidance: replace bearings in matched pairs when wear is found to keep balance, check for roughness or abnormal noise as indicators of failure, and maintain clean lubrication to prevent abrasive damage. Accurately seated bearings with minimal axial play enhance repeatable gear adjustments.