UC209-28 Bearing for Universal ProductsOne New Aftermarket Replacement UC209 28 Radial Insert Ball Bearing This UC209 28 is a UC200 series radial insert ball bearing with a 1 3 4" bore and spherical outer diameter, designed to seat inside a wide range of bearing housing units including pillow blocks, 2 bolt flanges, 3 bolt flanges, 4 bolt flanges, and take up units. The bearing locks to the shaft via two set screws on the extended inner ring and is pre lubricated with grease, ready for