I-crankshaft exhaswa ngokupheleleyo:Inani lejenali eziphambili ze-crankshaft enye ngaphezu kwenani leesilinda, oko kukuthi, kukho ijenali ephambili kumacala omabini kwijenali yentonga yokudibanisa. Umzekelo, i-crankshaft exhaswa ngokupheleleyo ye-injini ye-silinda-cylinder ineejenali ezisixhenxe eziphambili. I-injini ye-four-cylinder exhaswa ngokupheleleyo yi-crankshaft ineejenali ezintlanu eziphambili. Olu hlobo lwenkxaso, amandla kunye nokuqina kwe-crankshaft kungcono, kwaye kunciphisa umthwalo wokuthwala okuphambili kunye nokunciphisa ukunxiba. Iinjini zedizili kunye neenjini ezininzi zepetroli zisebenzisa le fomu.

I-crankshaft exhaswa ngokuyinxenye:Inani lejenali eziphambili zecrankshaft lingaphantsi okanye lilingana nenani leesilinda. Olu hlobo lwenkxaso lubizwa ngokuba yi-crankshaft engaxhaswanga ngokupheleleyo. Nangona owona mthwalo ungundoqo wolu hlobo lwenkxaso mkhulu kakhulu, unciphisa ubude be-crankshaft kwaye unciphise ubude be-injini. Ezinye iinjini zepetroli zinokusebenzisa olu hlobo lwe-crankshaft ukuba umthwalo uncinci.