Lock the centrifuge, place your flask in the cradle, and push the crucible up against the flask. Preheat the crucible, then pour your pre-weighed metal into it. Using an oxy-acetylene torch, melt the metals in your crucible and occasionally stir with a stirring rod. When the metals are completely melted, unlock the centrifuge, activating it, and flooding the molten metal into your flask. The centrifuge will spin for about one minute. Remove your flask from the cradle using tongs (it’s hot!).