Hirobo HI2500016 Flanged Ball Bearing, 4 x 9 x 4 mm, Pack of 2  [HI2500016]

Application and compatibility notes

The Hirobo flanged ball bearing is specified at 4 x 9 x 4 mm and is sold as two pieces. The flange acts as a locating surface to limit axial travel where casing depth is constrained.

As a rolling-element bearing it lowers friction and maintains rotational alignment for small drivetrains and linkage joints under light to moderate loads. Check the 4 x 9 x 4 mm dimension as the compatibility key for shafts and housings.

For correct installation, ensure the bearing is clean and pressed or otherwise secured in the bore, avoid loading the flange from the side, and confirm smooth free rotation prior to final assembly. Correct sizing reduces parasitic drag and helps restore drivetrain feel after maintenance.

Packing: Sold as 2 pcs per pack.