Radial insert ball bearings are based on sealed deep groove ball bearings, but have a convex outer ring and in most cases an extended inner ring with a certain locking device enabling quick and easy mounting onto the shaft. These bearings are available singly or as units, consist of a housing, bearing and seal that is preassembled and greased. These ready-to-mount units can accommodate moderate initial misalignment, but normally do not enable axial displacement of the shaft.  These bearings and units provide a simple, cost-effective solution that can provide a number of benefits.