Ekukhiqizweni kwangempela, akuwona wonke umshini wokuphonsa ongahlangabezana nezidingo zokusakaza imikhiqizo ehlukahlukene. Ngakho-ke, ukukhetha kufanele kusekelwe ezimweni ezithile, ngokuvamile kucatshangelwa izici ezimbili ezilandelayo:
(1) Ukukhethwa okusekelwe ezinhlotsheni ezihlukene zomkhiqizo namavolumu okukhiqiza
Uma uhlela-ukukhiqizwa kwamaqoqo amaningi-okuncane, ngokuvamile kuyadingeka ukukhetha umshini wokulingisa nge-die cast onohlelo olulula lwe-hydraulic, ukuguquguquka okuqinile, kanye nekhono lokulungiswa ngokushesha. Lapho uhlela izinhlobo ezimbalwa kodwa{3}}zokukhiqiza ivolumu enkulu,{4}imishini yokusakaza esebenza kahle kakhulu{4}ehlome ngemishini ehlukahlukene kanye nezindlela zokulawula ezizenzakalelayo kufanele kukhethwe. Ngokusakazwa kohlobo olulodwa olukhiqizwe ngobuningi, umshini ozinikele wokukhipha ukufa ungasetshenziswa.
(2) Ukukhethwa okusekelwe esakhiweni sokulingisa kanye nemingcele yenqubo
Ubukhulu bangaphandle, isisindo, nokuqina kodonga lokulingisa kunomthelela obalulekile ekukhethweni komshini wokuphonsa ithawula. Isisindo sokusakaza (okuhlanganisa isistimu yokufaka isango kanye neshaneli echichimayo) akumele seqe umthamo olinganiselwe womshini wokuphonsa ifa, kodwa akumele futhi sibe sincane kakhulu ukuze kugwenywe ukumosha amandla omshini wokuphonsa ithawula. Umthamo olinganisiwe womshini wokulingisa ingatholakala kumanuwali yeziqondiso. Imishini yokuphonsa i-Die inamabanga athile aphezulu kanye nobuncane besikhunta, ngakho-ke ubukhulu besikhunta nokuphakama kokuphonsa kufanele kube ngaphakathi kwemikhawulo ethile. Uma ubukhulu besikhunta noma ubude bokubunjwa bukhulu kakhulu, kungase kungenzeki ukususa ukubunjwa.
