Izingxenye zokuxhumana ezibalulekile (ama-impeller nama-liners) zenziwe ngensimbi enobulukhuni obuphezulu, engagugi noma ama-alloy akhethekile futhi zenzelwe ukumelana nokuguguleka kobulukhuni obukhulu bezinto eziphikisayo (njenge-corundum, i-silicon carbide, kanye ne-spinel), okwandisa kakhulu impilo yemishini futhi kunciphisa izindleko zokulungisa.
Kuthuthukisa kakhulu izakhiwo zokubumba zezinto ezingaphili;
Udaka oluxutshwe futhi luxutshwe lufana futhi lufana, futhi aluhlukanisi;
Ngaphansi kwesisekelo sokuqinisekisa ukuthi i-plasticity iqinile, ubuningi bengxube buphezulu, futhi akukho ukuxega kodaka.