Ma gearbox a Rotary mower ndi gawo lofunikira la makina otchetcha udzu omwe amagwiritsidwa ntchito paulimi podula ndi kudula.Cholinga cha bokosi la gear ndikutumiza mphamvu yopangidwa ndi shaft ya thirakitala's power take-off (PTO) kupita kumasamba ozungulira podula ndi kudula udzu, mbewu kapena zomera zina.Bokosi la giya logwira ntchito bwino ndilofunika kwambiri chifukwa limaonetsetsa kuti masamba otchetcha amazungulira mwachangu kuti adule mwachangu ndikudula zomera zowirira.Gearbox yokha nthawi zambiri imapangidwa ndi chitsulo choponyedwa kapena aluminiyamu.Zili ndi zigawo zingapo zofunika monga zolowetsa ndi zotulutsa, magiya, ma bearings, ndi zisindikizo.Shaft yolowera imalumikizidwa ndi PTO ya thirakitala yomwe imayang'anira kupanga mphamvu zozungulira.