Uruziga rw'ibinyabiziga ni icyuma cya silindrike gishyigikira imbere imbere yipine kandi gishyizwe kumurongo. Hariho ubwoko butandukanye bwibiziga bitewe na diameter, ubugari, uburyo bwo kubumba, nibikoresho.
Iyo diameter yinyuma yipine idahindutse, birakenewe gusimbuza uruziga rwiziga hamwe nipine hamwe nikigereranyo cyo hejuru. Ibi bigabanya urujya n'uruza rw'ikinyabiziga, bigatuma birushaho guhagarara neza gutwara no gutanga ibyiyumvo byoroheje iyo bigororotse. Ariko ikiguzi nuko imikorere yo gukurura ihungabana igabanuka cyane, ndetse nigitero gito kizoherezwa mumodoka, bikagabanya cyane ihumure. Byongeye kandi, amapine aringaniye kandi yoroheje afite imbaraga nke zo guhangana nimbaraga zo hanze, cyane cyane iyo zikubiswe nibintu bikarishye, byangiritse byoroshye.