The shafts lead through watertight shaft tunnels, and are supported at intervals by bearings known as plummer blocks; they emerge from the hull through a shaft tube fitted with a watertight gland .
Le migodi ikhokelela kumatonela emigodi engangeni manzi, kwaye ixhaswe ezithubeni ngezithinteli ezaziwa ngokuba zizithinteli ze-plummer; sisuka kwisiqu senqanawa sidlule kwityhubhu yomgodi efakelwe idlala elingangeni manzi.