Umubyimba wibyuma byinshi wabonye Icyuma Muri théorie, turizera ko icyuma kibonye cyoroshye, cyiza. Kerf iboneka mubyukuri ni ubwoko bwo gukoresha. Ibikoresho byumusemburo wabonye icyuma nigikorwa cyo gukora icyuma kibonerana cyerekana ubunini bwicyuma. Niba umubyimba ari muto cyane, ibyuma byinshi byuma byoroshye kunyeganyega mugihe ukora, bigira ingaruka zo guca. Dufashe urugero rwinshi rwicyuma, urugero rwuburebure bwa 110-150MM ya diameter yo hanze irashobora kuba 1,2-1.4MM, naho umubyimba wa 205-230MM ya diameter yo hanze wabonye icyuma kingana na 1.6 -1.8MM, gusa bikwiriye gukata ibiti byoroshye hamwe n'ubucucike buke. Mugihe uhisemo umubyimba mwinshi-mwinshi, ugomba gutekereza ku gihagararo cyicyuma hamwe nibikoresho bigomba gutemwa.

Kugeza ubu, mu rwego rwo kugabanya ibyo ukoresha, ibigo bimwe na bimwe byatangiye gukora ibyuma byinshi byitwa plaque bifite plaque ya convex imwe cyangwa impande ebyiri ,, impande zombi z'umwobo wo hagati zirabyimbye, kandi uruhande rw'imbere rw'uruvange ni kunanuka, hanyuma amenyo arasudira kugirango yizere gukata. Igihe kimwe, kugirango ugere ku ngaruka zo kuzigama ibikoresho, ubujyakuzimu butarenze 40MM. Igice cyibikoresho cyagenewe kugira ingaruka zo gutema bitaziguye, kandi birakenewe gushiraho ibyuma byinshi. Icyuma kibisi cyo gutemagura muri rusange kibyimbye kibisi kugirango harebwe neza gukata inkombe.

Ubwiza bwibyuma byinshi byuma bigira uruhare runini, kuko buriwese azi ko ibyuma byinshi byuma bikoreshwa mumashini akora ibiti byahinduwe kugirango bizunguruke. Ntabwo yohereza imbaraga zo guca gusa ahubwo inakomeza gukora neza. Ibyuma byinshi byiza cyane Icyuma ntigifite gusa igipimo cya geometrike ihagaze neza, ariko cyane cyane, imiterere yacyo ni nziza cyane. Yarakaye inshuro nyinshi kandi ifite ubuzima burebure. Ubwiza bwo gusudira karbide ya sima nayo ni ngombwa cyane. Iyo ibyuma byinshi bibonye bigenda bikata, kugirango ubushyuhe bwikibaho kibone kuzamuka vuba, kandi ikibaho cyiza cyo hejuru gishobora kugumana urwego rwo hejuru rwukuri muri uru rubanza, mugihe icyuma kibonye gifite ubuziranenge kizangiza ikibaho, kugirango amenyo yabonetse ashobora kwihanganira Imbaraga nini zo gutema, gukata neza ibiti ni hejuru cyane.