Uma ushaya umgwaqo ongaphandle komgwaqo, amasondo enziwe nge-alloy ayigugu kakhulu. Njengoba ekhiqizwa ngokufakwa kwe-CNC okuthuthukisiwe, i-alloy iba ncane kakhulu, ingabi namaphutha, inamandla okubambelela athuthukisiwe futhi ikwazi ukumelana namandla amakhulu angaphandle komgwaqo njengokukhuphuka izintaba noma ukuwela imihosha.
Isilinganiso samandla nobuningi be-alloy esilungiselelwe kahle sinciphisa isisindo ngaphandle kokwenza buthaka, sithuthukisa ukudluliselwa kwamandla ezingwadule noma emaxhaphozini. Isembozo esikhethekile sivikela ukugqwala ezindaweni ezinzima.
Ngokuklanywa, izipoki ezijiyile, nezihlukahlukene ziqinisa ukuqina futhi zibukeke ziqinile. Irimu lifanela amathayi abanzi, liqinisa ukubamba ezindaweni ezinzima futhi livikela iziqu zamavalvu. Lihambisana namamodeli angaphandle komgwaqo asemhlabeni wonke kusukela kumasentimitha angu-17 kuya kwangu-20, ukufakwa kubushelelezi ngokuvalwa nokubopha okufanele, kuqinisekisa ukuzethemba kuyo yonke indawo yokubalekela ngaphandle komgwaqo, lilungele ukubhekana nezinselele zemvelo.