No. The centrifugal casting production process involves feeding molten metal directly into the center of the product which creates an inside diameter where the oxides accumulate. The inside diameter or ID is a key and necessary component of this process, as the molten metal conforms to the inside diameter and then becomes solid as it cools. Any impurities or lighter oxides travel to the inside diameter during the casting process and can then be removed once solidification occurs. This is achieved by machining the inside diameter. Click here to see a foundry pour in action at Delta Centrifugal.