Iigiya ze-Ground spiral bevel luhlobo lwegiya eyilelwe ngokukodwa ukuphatha imithwalo ephezulu kwaye ibonelele ngokusebenza ngokutyibilikayo, ibenza ukuba bafaneleke ngokukodwa kwimisebenzi enzima efana nezixube zekhonkrithi.
Iigiya ze-bevel bevel eziphantsi komhlaba zikhethelwa abaxube bekhonkrithi ngenxa yokukwazi kwabo ukuphatha imithwalo enzima, ukubonelela ngokusebenza ngokutyibilikayo kunye nokusebenza kakuhle, kwaye banikezela ubomi benkonzo obude kunye nokugcinwa okuncinci. Ezi mpawu zibalulekile ekusebenzeni okuthembekileyo nokusebenzayo kwezixhobo zokwakha ezinobunzima obufana nezixube zekhonkrithi.