The article said it wasn’t visible because that stub was machined after it was placed in the hub. Which begs the question “why would you weld a tube in place an

The article said it wasn’t visible because that stub was machined after it was placed in the hub. Which begs the question “why would you weld a tube in place and then finish machining it after?” Maybe it was easier/faster to machine it while it was on a hub. Also, wasn’t there an oil filter that had to go in there? Wouldn’t the oil filter experience interference if the counterbore was offset? Closing comment: damn I thought people paid more attention when building turbines.