Hirobo HI2500056 Ball Bearing 5 x 8 x 2.5 mm, 2 pcs  [HI2500056]

Ball bearing 5 x 8 x 2.5 mm, 2 pcs

This is an RC-scale replacement ball bearing supplied as a pair, sized 5 x 8 x 2.5 mm and provided as 2 pcs for small helicopter assemblies. It is intended for use in rotor heads, gear carriers, and other rotating points where this bearing dimension is specified.

Compatibility is determined by matching bearing inner and outer diameters and width to the original part. For installation, align the bearing on the shaft or into the housing and apply even pressure until seated; avoid forcing at an angle to prevent race or ball damage. This part is a like-for-like mechanical component, use only where the 5 x 8 x 2.5 mm bearing size is required.

In tuning and maintenance the bearing’s primary role is to reduce friction and maintain shaft concentricity. Inspect bearings for play or roughness, replace in matched pairs when wear is evident, and use light, appropriate lubricants as part of routine upkeep to preserve smooth operation in small RC helicopters.