Igiyaibhekisela egiyeni elisonqenqemeni lokudluliswa kwe-meshing okuqhubekayo kokunyakaza namandla ezingxenye zemishini, ngezinyo legiya, i-tooth groove, ubuso bokuphela, ubuso obujwayelekile, isiyingi esiphezulu sezinyo, indilinga yezimpande zezinyo, indilinga yesisekelo, indilinga ehlukanisayo nokunye. izingxenye, isetshenziswa kabanzi ekudluliselweni kwemishini nakuwo wonke umkhakha wemishini.
Indima yegiya ikakhulukazi ukudlulisa amandla, ingadlulisela ukujikeleza kwe-shaft kwenye shaft, inhlanganisela yegiya ehlukile ingadlala indima ehlukile, ingabona ukwehla kwemishini, ukukhula, ukushintsha isiqondiso kanye nesenzo sokubuyisela emuva, ngokuyisisekelo amadivaysi emishini ayihlukaniseki egiyeni.
Kunezinhlobo eziningi zamagiya.Ngokwezigaba ze-shaft yegiya, ingahlukaniswa ngezinhlobo ezintathu: igiya le-parallel shaft, i-intersecting shaft gear kanye negiya le-shaft elinyakazayo.Phakathi kwawo, igiya le-shaft elihambisanayo lihlanganisa negiya le-spur, igiya le-helical, igiya langaphakathi, i-rack kanye ne-helical rack, njll. igiya, igiya lezikelemu, igiya le-hypoid nokunye.