configured as axle stubs however a continuous axle would also be conceivable the temporary axles 3 u2032 in turn are mounted in temporary bearings 12 which are directly or indirectly supported on the mill foundations 7 which are provided for the future mounting in the illustrated exemplary embodiment supports 7 a for carrying the temporary bearings 12 are attached to the foundations 7 during machining according to fig4 and 5 the raceway if expediently are only pre machined such that the final manufacturing of the running surface takes place after welding of the cylinder sections wherein the mill cylinder is mounted by way of the temporary axles 3 u2032 and the running surface thus does not yet come in contact with the future friction shoe bearings 13 in turn a machining tool 14 which again comprises a mount 14 a a bearing 14 b a displacement mechanism 14 c and a tool 14 d is provided for final machining of the raceways 1 f the machining tool 14 is disposed with the bearing 14 on the temporary shaft 3 u2032 such that said machining tool 14 can rotate together with or about the temporary axle and here comes into machining contact with the raceway 1 f a grinding tool may be applied here as the tool 14 b for example after completion of the raceways 1 u2032 e the mill cylinder 11 is lowered so as to establish contact between the raceways 1 u2032 e and the friction shoe bearings 13 the temporary axles 3 u2032 and the reinforcements are dismantled and removed here the temporary axles 3 u2032 not only enable rotation of the machining tool 14 but also serve for rotation of the mill cylinder 11 such that all regions of the.