Kugororoka muri rusange bivuga ibyuma bizunguruka bihuza ibyuma bya pisine, ni ukuvuga ibyuma bito bito, kugirango byongere imbaraga za purline kandi bituma purline idakunda guhungabana no kwangirika bitewe nimbaraga zimwe ziva hanze. Hano hari imirongo ya diagonal (ni ukuvuga dogere 45-yunamye ku mugozi wa screw) hamwe n'imirongo igororotse (ni ukuvuga byose biragororotse). Nyuma yo kuvura bishyushye, ingaruka za antirust ziragerwaho.
1. Shakisha imbaraga zikomeye zo kubaka ibyuma. Ibisubizo biramba kandi byizewe byihuse biboneka nonaha.
2. Menya ubuziranenge bwo hejuru-imbaraga zo hejuru zubaka ibyuma. Ibyingenzi kubwubatsi butekanye.
3. Gura imbaraga zikomeye kugirango ushyigikire ibyuma. Menya neza umutekano n'umutekano ku mishinga yawe.
4. Shakisha imbaraga nziza zo hejuru zubaka ibyuma. Ibisubizo byizewe byokubaka kubwuburyo ubwo aribwo bwose.
5. Shora imbaraga zikomeye kumashanyarazi. Menya ubunyangamugayo n'umutekano byimishinga yawe yo kubaka.