Isingeniso: Endaweni enkulu yezinhlelo zezinjini zezimoto, izingxenye eziningana zisebenza ngokuvumelana ukuqinisekisa ukusebenza okubushelelezi. Enye yezinto ezinjalo ebalulekile yisembozo secala le-crank. Kulesi sihloko, sizohlola emhlabeni wezembozo zamacala e-crank, ukuhlola ukubaluleka kwabo nokuthi banikela kanjani ekusebenzeni okuphelele kohlelo lwenjini. 1. Ukuqonda Izimbozo zeCrank Case: I-crank