companion

Hi everyone this is my first post to the forum, really excited to do a light restoration on a machine I got today. I know it’s rough but I’m a glutton for punishment, I believe it is a companion lathe from 1937-1940. I need to put the pulleys back inside the headstock, find a tail stock and...

I have an old companion drill press that has a keyless chuck that has seen better days. It looks like a 1/2" fine thread (maybe 20tpi?). Does anyone know if this can be replaced? Is the threaded portion part of the spindle, or just pressed in? Pics are attached. -Tom