Shaft 3 : A machine component, usually round in cross section, rotating in bearings and used to transmit rotary motion from one point to another or support rotating components
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}