Yayifudula isiko ukuqwalasela iseti enye yomgangatho wemveliso, okanye uhlalutyo lwesikrini, iijika njengoko zifanelekile ukumela imveliso yezondlo zombini eziziiprayimari (ezingakhuselwanga) kunye nezesekondari (ezikhuselweyo), ungenzi sibonelelo se-ore into engaphantsi kobungakanani obuhlala bukhona, kumlinganiselo othile, kwizinto eziqhutywa ekwarini nakwizinto eziqhutywa ngumgodi.I-avareji inkwali ayivelisi kakhulu kweli litye undersize njengoko mgodini avareji, kodwa umkhuba eqhelekileyo kwimisebenzi yemigodi kukukrazula off uninzi undersize phambi primary crusher.Ngokomzekelo, emhlathini isityumzi ngokuqhelekileyo isetyenziswa isityumzi primary.
