Another AgTech project involves cutting a window in a large cast-iron transmission case. I read that plasma cutting does a good job on CI, and I had good results cutting up some scrap.
This case probably weighs around 400 pounds, and it's about 36" tall by 24" wide and 24" long. One end is open. The thickest part of the case is about 2", but the area where I need to cut is about 3/4" with some thicker ribs. I'm going to leave the heavy mounting flange intact around the open end.
Should I be worried that the heat from the plasma cutting will cause the casting to crack? What can I do to reduce the chances of cracking it?