Whilst off Mauritius her starboard outboard shaft fractured and she lost her screw and shafting. Climbing these shafts is known as shafting. Then, propulsion shafting, propellers and rudders were all placed in the stern. One mid 19th century factory had 1,948 feet of line shafting with 541 pulleys. Propeller production includes controllable-pitch propeller (CPP), blades, and lines of shafting. During this period of time the propeller shafting and associated wheels were overhauled. Nitronic 50 is used in marine environments, including boat shafting and solid rod rigging. The cast iron breastshot waterwheel drove three pairs of stones through wooden shafting. The phallic shape of the structure invites its designation as a shafting device. However, it still had disc/roller integrators as well as shafting to interconnect the mechanical elements. Until the 1920s, the mill was also powered by awater wheel which powered overhead shafting. The heavier machines also required new line shafting, that was made by RDM. On the roof there are grouped chimneys with decorative shafting.