Iimbonakalo:
Ifanele imveliso yobunzima obufanayo, isithathu kwindawo enye yokomba kunye nokusila intambo yokusila ikwazi ukuphumeza ukusetyenzwa komngxuma ongezantsi, i-chamfering, kunye nokucubungula intambo yangaphakathi ngaphandle kokutshintsha isixhobo, ukunciphisa ixesha lokungaqhubeki, kunye nokuphucula ukusebenza kakuhle kwemveliso.Ifanelekile kwi-alloy yobhedu, i-alloy aluminium kunye nezinye iintsimbi ezingenayo i-ferrous.