I-crankshaft esekelwe ngokugcwele:Inombolo yamajenali amakhulu e-crankshaft ingaphezu kwenani lamasilinda, okungukuthi, kunejenali eyinhloko nhlangothi zombili zejenali ngayinye yenduku yokuxhuma. Ngokwesibonelo, i-crankshaft esekelwe ngokugcwele yenjini enamasilinda ayisithupha inamajenali ayisikhombisa ayinhloko. Injini enamasilinda amane i-crankshaft esekelwe ngokugcwele inamajenali amahlanu amakhulu. Lolu hlobo lokusekela, amandla kanye nokuqina kwe-crankshaft kungcono, futhi kunciphisa umthwalo wokuthwala okuyinhloko futhi kunciphisa ukuguga. Izinjini zikadizili kanye nezinjini eziningi zikaphethiloli zisebenzisa leli fomu.

I-crankshaft esekelwe kancane:Inombolo yamajenali amakhulu e-crankshaft ingaphansi noma ilingana nenani lamasilinda. Lolu hlobo losekelo lubizwa nge-crankshaft engasekelwe ngokugcwele. Nakuba umthwalo omkhulu walolu hlobo lokusekela mkhulu kakhulu, unciphisa ubude be-crankshaft futhi unciphise ubude benjini. Ezinye izinjini zikaphethiloli zingasebenzisa lolu hlobo lwe-crankshaft uma umthwalo umncane.