material on the existing roll shaft 11 fig1 shows a diagrammatic cross sectional view of a deflection compensated roll provided with an almost round profiled shaft 11 and fig1 shows a deflection compensated roll with a so called movable shell the shaft of which is essentially rectangular in cross section reference numeral 14 b denotes the bearing means of the roll the coating 50 may be formed for example by providing the shaft first with a base treatment for example with glue and by then winding a reinforcing fiber layer of for example glass fiber or carbon fiber around the shaft and by adding the matrix material to the reinforcing fiber layer the addition of matrix material can be carried out for example by dipping the fibers to be wound in matrix material before winding or by spraying matrix material on the surface of the shaft while winding the fibers after coating bores for the loading elements 17 and bearing elements 14 b may be finishing cut on the shaft through the coating and the means to be fixed on the shaft such as oil collection means may be added coating made by winding also makes possible relatively easy coating of shafts provided with straight surfaces fig1 fig1 shows a view in principle of a prior art suction roll without an internal suction box the suction roll comprises a roll shell 111 which is fitted with bearings to rotate on shaft journals.