Hirobo HI2500017 4 x 8 x 8 mm Precision Roller Bearing Pair  [HI2500017]

4 x 8 x 8 mm precision roller bearing

This Hirobo HI2500017 roller bearing is supplied as a pair for RC-scale replacement, suitable for small internal rotating mechanisms where compact bearings are required. The product is sold as 2 pcs to allow straightforward component swaps during maintenance.

In applied RC work the bearing lowers friction at low to moderate rotational speeds and helps maintain correct shaft alignment. Typical installation involves removing the old bearing, checking the housing and shaft tolerances, then pressing the replacement onto the shaft using even pressure or a purpose-made bearing driver.

For ongoing care verify seating depth and endplay after installation, use a light model-grade lubricant if appropriate, and inspect regularly for wear or looseness that may affect drivetrain smoothness. This item is intended for model-scale use and not full-scale applications.