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

Small-format ball bearings for hobby assemblies

This item is supplied as two pcs of 3 x 7 x 3 mm ball bearings intended for small helicopter and model applications. As hobby replacement parts, they reduce friction at rotating joints and help support shafts in rotor linkages and compact driveline subassemblies.

Key considerations for fit and compatibility:

• Specification and quantity: 2 pcs of 3 x 7 x 3 mm bearings per pack, identified by model number HI2500086.
• Fitting recommendations: press into a clean, accurately sized bore using a soft driver on the outer race; avoid impact on the inner race and confirm shaft engagement before finalising assembly.
• Inspection and upkeep: regularly check for smooth rotation and signs of contamination; replace bearings showing roughness or lateral play and apply lubrication only as suitable for the bearing configuration.
• Operational effect: correctly fitted fresh bearings can reduce unwanted friction and play, contributing to steadier performance in small rotor and drivetrain systems.