Calender thermo rolls smooth the surface of the paper, thus improving its printability. Calender rolls can be heated or cooled. The thermo rolls of so-called soft calenders can be arranged either above or below a counter roll. Depending on their position, the bearings are subjected to either very high or low loads. The bearing arrangement must be designed for both of these conditions. The high temperatures needed to heat the rolls make oil cooling lubrication with synthetic oil necessary.