Iigiya lezikelemuI-shaft isetshenziswa kakhulu ku-gearbox wezimboni ezahlukene ngenxa yekhono layo lokuhlinzeka ngetorque ephezulu, ukunyakaza okushelelayo, namandla okuzikhiya. Enye yezinhlelo zayo eziyinhloko isezinhlelweni zokunciphisa isivinini, lapho isiza khona ukuzuza ukulawula kwejubane okuphawulekayo kuyilapho igcina ukusebenza kahle kwamandla. Lokhu kuyenza ilungele imishini edinga ukunyakaza okunembile, njengamabhande okuthutha, amakheshi, nezinto zokuphakamisa.
Embonini yezimoto, ama-worm gear shafts asetshenziswa ezindleleni zokuqondisa, ukuqinisekisa ukunyakaza okushelelayo nokulawulwayo kwezimoto. Ayatholakala futhi kuma-winches nama-hoists, anikeza ukuzinza nokuvimbela ukushayela emuva, okuthuthukisa ukuphepha.
Emishinini yezimboni, amagiya egiya lezikelemu adlala indima ebalulekile kuma-mixers, imishini yokunyathelisa kanye nemishini ezishintshayo, lapho ukunyakaza okulawulwayo kanye nokudluliselwa kwetorque ephezulu kubalulekile. Zibuye zisetshenziswe emishinini yendwangu, imishini yezokwelapha, namarobhothi, okuvumela ukunyakaza okunembayo nokubamba umthwalo.
Ukwengeza, izinsimbi zegiya lezikelemu zitholakala ezintweni zasendlini, njengezinjini zikagesi, izivula zezicabha zegalaji, ngisho nezinhlelo zokushuna izinsimbi zomculo. Ukuqina kwazo, ukusebenza ngokuthula, nokusebenza kahle kwazo kuzenza zibe ingxenye ebalulekile ekusebenziseni imishini yesimanje