Ubulukhuni obuphezulu bentsimbi buthandwa kwisixhobo sokusika, ifa kunye namashishini obumba.Ubukhulu becala ukujika, umphezulu wokungqusha ulungile, kodwa xa ufuna ukugqibezela kakuhle umphezulu, kufuneka uwucole.Kodwa ngenxa yokuqina okuphezulu kwentsimbi, amavili abrasive aqhelekileyo asebenza kakubi.Ewe, amavili e-CBN ngawona mavili okusila angcono okanye amavili abukhali kwiiNsimbi eziQinisekileyo.