Crank 2 : A lever attached to a shaft, carrying a pin whose axis is offset from but parallel to, the axis of the shaft. In general, the radius of the crankpin is smaller than the offset between the axes (throw)
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}