This is my workplaces full time deburring machine, however I have no idea why it has 2 heads. The second one was obviously and was an afterthought and it is slapped together. it was originally a craftsman drill press. does anybody know the reasons when it has a second head, and if so does your shop have similar drill presses.
Maybe they wanted a rough bit that they could apply side loads to without damaging the bushings in the main shaft. Having damaged bushings makes accuracy very difficult.
Also a Jacobs chuck isn’t really meant to take side loads… guess how I know?