Originally Posted by
73StellaSX76
I think a well lubricated and cooled carbide drill bit from both ends would make short work of this. As far as strength is concerned, if you're not embiggening the tap drill hole diameter then it should be as strong as the original section which has a larger effective unsupported bore. Make an aluminum split bushing to hold the center section if you need to. A carbide bit is not going to be too cheap though.
My thoughts exactly. There is a lot of beef outside of that thread cut diameter. When first handling the spindle it felt more like a railroad spike than a bike part.