Hirobo HI2500069 Open Ball Bearing 5x11x3 mm, Pack of 2  [HI2500069]

Compact bearing for model shaft assemblies

The Hirobo HI2500069 is supplied in a set of two open-style ball bearings sized 5 x 11 x 3 mm. It serves as a small bearing solution for rotating parts in model helicopters and other compact radio-controlled models where low profile is required.

Open construction makes inspection and relubrication straightforward during setup or troubleshooting. When mounted correctly, this bearing helps keep shaft alignment accurate while minimizing friction in small drivetrains and rotor linkages.

Fitting advice:

• Verify the shaft and housing bores are free from dirt and sharp edges before installation.
• Apply even pressure to the outer race when pressing into a housing; do not push on the inner race.
• If necessary, use a small amount of light grease suitable for model bearings to improve initial smoothness.

Maintenance considerations:

Swapping old bearings for new HI2500069 units can reduce noise and vibration. Also check mating gears and linkages for wear because bearing play can alter gear mesh and rotor tracking.