Isixhoboibhekisa kwigiya ekwirim yokuhanjiswa kwemeshing eqhubekayo kunye namandla ezixhobo zoomatshini, ngezinyo legiya, igroove yezinyo, ubuso besiphelo, ubuso obuqhelekileyo, isangqa sentloko yezinyo, isangqa sezinyo, isangqa sesiseko, isangqa esahlulayo kunye nokunye. iinxalenye, isetyenziswa ngokubanzi kuthungelwano ngoomatshini kunye nentsimi yonke yoomatshini.
Indima yegiya ikakhulu kukuhambisa amandla, inokudlulisa ukujikeleza kweshafti iye kwenye ishafti, indibaniselwano yegiya eyahlukileyo inokudlala indima eyahlukileyo, inokuqonda ukuhla komatshini, ukukhula, ukutshintsha isalathiso kunye nesenzo sokubuyisela umva, ngokusisiseko izixhobo zoomatshini zi. ayinakwahlulwa kwisixhobo.
Kukho iintlobo ezininzi zeegiya.Ngokohlelo lweshaft yegiya, inokwahlulwa ibe ziindidi ezintathu: igiya yeshaft enxuseneyo, igiya yeshaft edibeneyo kunye negiya yeshaft egxadazayo.Phakathi kwazo, iigiya ze-shaft ezihambelanayo zikwabandakanya i-spur gear, igiya ye-helical, igiya yangaphakathi, i-rack kunye ne-helical rack, njl njl. izixhobo, izixhobo zeentshulube, izixhobo ze-hypoid njalo njalo.