Zozungulira izizida za bevelseti idagwiritsidwa ntchito mu thirakitala. Mu thirakitala, ili kutsogolo kwa gudumu komanso kumbuyo kwa gearbox. Njira zonse zotumizira ndi zipolopolo zimatchedwa chitsulo cham'mbuyo, ndipo ntchito yake yaikulu ndikukwera, kuwonjezeka, kuchepetsa ndi kusintha torque .Kuphatikiza ma thirakitala okhala ndi injini zodutsa zomwe zimagwiritsa ntchito ma cylindrical gear pairs monga kufala kwapakati, ambiri a iwo amagwiritsa ntchito bevel. ma giya awiriawiri, omwe samangowonjezera torque ndikuchepetsa liwiro, komanso amasintha ma torque.