The bearings made from strips or coil has s lit along the length of the bushing and those made from casting, extrusion or from forged material doesn't. The split bearings generally take the final form depending on the housing (Bushing OD ref) as these are press fitted and relatively the final bore (Bushing ID ref) changes which in most cases are predetermined as mentioned in the catalogue.The bearing performance mostly depends on the final clearance between the shaft OD and the clearance between the final bore of the bush, bearing or the sleeve.