Hirobo HI2500069 Open Ball Bearing 5 x 11 x 3 mm, Pack of Two  [HI2500069]

Micro ball bearing for hobby models

The Hirobo HI2500069 ball bearing is offered as a two-unit set in open configuration with measurements of 5 x 11 x 3 mm. It is suitable for compact rotating parts in model helicopters and other small radio-controlled assemblies where a low-profile bearing is required.

Open design permits inspection and relubrication during maintenance, though it provides less exclusion against contaminants than a sealed bearing. Correct installation keeps shafts aligned and lowers friction in small gear trains and linkages.

Fitment recommendations:

• Ensure both seating bore and shaft are clean and free from nicks before pressing the bearing home.
• When installing, apply force to the outer race to protect the inner race and rolling elements.
• If needed, apply a modest amount of suitable bearing lubricant designed for model use to enhance smoothness.

Compatibility and checks:

When replacing bearings such as the HI2500069, examine nearby pinions and linkages for wear because bearing clearance can influence gear engagement and tracking. Fresh bearings often reduce unwanted vibration and restore quieter rotation.