Ma'anar ƙamus na kalmar "crankcase" ita ce mahalli don crankshaft a cikin injin konewa na ciki. Yawanci babban simintin ƙarfe ne wanda ke ɗauke da crankshaft, igiyoyi masu haɗawa, pistons, da sauran abubuwan da suka haɗa ƙarshen ƙarshen injin. Har ila yau, crankcase yana da alhakin haɗawa da rarraba man injin ɗin da ke shafawa da sanyaya sassan injin ɗin.
