What is the casting method with the largest machining allowance?

Centrifugal casting is the casting method with the largest machining allowance. Inquiring about relevant information shows that centrifugal casting is a casting method in which molten metal is poured into a rotating mold, filled with centrifugal force and solidified. Centrifugal casting has some disadvantages: it has some limitations when used to produce special-shaped castings. The diameter of the inner hole of the casting is inaccurate, the surface of the inner hole is rough, the quality is poor and the machining allowance is large. Castings are prone to specific gravity segregation.