Ground spiral bevel gears yog ib hom iav uas tau tsim tshwj xeeb los tswj cov khoom hnyav thiab muab kev ua haujlwm du, ua rau lawv tshwj xeeb tshaj yog rau cov ntawv siv hnyav xws li cov pob zeb sib tov.
Lub hauv av kauv bevel iav raug xaiv rau cov pob zeb sib tov vim lawv muaj peev xwm los tuav cov khoom hnyav, muab kev ua haujlwm du thiab ua haujlwm tau zoo, thiab muab lub neej ua haujlwm ntev nrog kev saib xyuas tsawg. Cov yam ntxwv no yog qhov tseem ceeb rau kev txhim khu kev qha thiab ua haujlwm tau zoo ntawm cov cuab yeej siv ua haujlwm hnyav xws li pob zeb sib tov.