Sobanura ingaruka zamazu yihanganira kwihanganira imikorere yisoko yumuraba hamwe n '' ikintu cyagutse '.

Imikorere yumuraba yunvikana cyane kumyubakire ya diameter $ D_h $. Niba bore iri kumipaka ntarengwa yo kwihanganira kandi kwaguka kwizuba ryisoko $ \ Delta D $ ni muremure, inkombe yinyuma yisoko izakoresha imbaraga zikomeye za radiyo kurwanya bore. Ibi bizana imbaraga zo guterana $ F_f = μ \ cdot N $, aho $ μ $ ari coefficient de friction na $ N $ nimbaraga zisanzwe zirwanya bore. Ubu bushyamirane bwiyongera ku mutwaro wa axial usabwa kugirango ugabanye isoko, biganisha ku guterana kwa preloads. Ba injeniyeri bagomba kwerekana $ D_h $ kuburyo $ D_h> D_o + \ Delta D $ kubintu byinshi (MMC).