Collar 04 : A raised ring on the surface of a shaft. May be an integral part of the shaft or fixed to it in some way, often used to locate a component on the shaft
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}