3 x 7 x 3 mm Ball Bearings HI2500086 by Hirobo, 2 pcs  [HI2500086]

Compact bearings for model mechanics

Supplied as a pair, these 3 x 7 x 3 mm ball bearings are suitable for small helicopter and model applications. They function as replacement hobby parts to reduce friction where shafts and rotating joints require smooth support.

Key maintenance and usage points:

• Count and size: contains 2 pcs, dimensions 3 x 7 x 3 mm, model HI2500086.
• Fitting guidance: install by pressing the outer race into a clean, correctly sized bore using a soft driver; avoid transmitting impact through the inner race.
• Care advice: inspect for smooth free-spin and contamination; replace bearings that show roughness or lateral play and apply lubrication as appropriate for the bearing type.
• Performance note: replacing worn bearings can reduce friction and play, contributing to steadier drivetrain and rotor operation on micro models.