WHAT ARE THE “AS CAST” DIMENSIONAL TOLERANCES I CAN EXPECT?
Typically, a linear tolerance of ±.005 in/in is standard for investment casting. This varies depending on the size and complexity of the part. Subsequent straightening or coining procedures often enable even tighter tolerances to be held on one or two specific dimensions. A concerted initial effort between the customers and the foundry’s engineering staff can often result in an investment casting drawing for a part that substantially reduces or completely eliminates the previous machining requirements to produce an acceptable part.
