These UKP bearing units are supplied with a fully sealed bearing insert fitted in the 2 bolt cast iron pillow housing and include a grease nipple to facilitate re-lubrication. The inserts can easily be removed from the housings (by twisting them through 90 deg, for replacement as required. They can also be aligned in the housing in the same manner as the outer of the bearing insert has a spherical profile and will tolerate some degree of misalignment).