Below is a 30" diameter fully machined aluminum damper casting made using a shell core at the Alcast Company aluminum foundry
Alcast Company can produce helically drawn shell cores, below is an example of a retarder casting produced with these shell cores. This part also has a cast in iron insert.
Below is a fully machined cast aluminum blower with a shrink fit stainless steel insert installed. This assembly is also done at Alcast Company.
Below are two of the automotive cast aluminum housings made in the Alcast Company aluminum foundry