RC Helicopter Ball Bearing Set 2 x 7 x 3.5 mm Hirobo HI2500097 2 pcs  [HI2500097]

Compact 2x7x3.5mm bearings for model rotors

This replacement set contains 2 pcs of compact ball bearings sized 2 x 7 x 3.5 mm listed under Hirobo HI2500097. The parts are intended as direct, small-scale replacement bearings for general RC helicopter and small-model drivetrain use, where accurate, low-friction rotation matters.

Use these bearings where shaft clearance and radial support are critical, for example in tail rotor shafts, small gearboxes, or linkage pivots. The 602ZZ identifier in the product name denotes the bearing series used by Hirobo for small component assemblies, so confirm fit on the original shaft and housing before installation.

Installation notes: press the bearing into a clean housing using even pressure on the outer race, avoid applying force through the inner race to prevent damage, and check axial alignment after seating. A light application of suitable bearing lubricant can extend service life, but avoid over-lubrication that attracts debris.

Tuning and maintenance: inspect bearings for play, rough rotation, or noise during routine maintenance cycles, and replace both pcs as a matched pair when wear is detected to preserve balance and smooth operation of rotor and drivetrain components.