Face 6 : That part of a component in contact with a mating component, e.g. (1) Of a flat belt pulley - the outer rim. (2) Of a friction clutch - the flat side
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}