Crankshaft: The main engine shaft from which power is taken. It converts the reciprocating motion of the engine pistons into rotary motion for automobile use. Related posts: Personnel Management Operative Functions Administrative Role of PM Competency HR Management Role Change Personnel Policies Personnel Procedures Appealed Policies Implied Policies Specific Policies Personnel records Research Pure research Personnel research Attitude or Opinion Survey Turnover Secondary research Applied research Personnel audit Read more articles Previous PostCrankcase Next PostCrankshaft counter-balances