Jim, thanks for all the recommendations to look at. I found an exploded diagram from a similar milling head by Van Norman. Not the exact one, but one for a No. 12 machine like mine. Maybe a different year? It definitely has a different taper on it though.
The picture i have of that head has a couple key distinctions that still has me scratching my head. First is that mine doesn't have a set screw on the ring gear in the spindle. Second is, mine doesn't have screws that hold the top / bottom flanges on to provide preload to the bearings. I have circled these differences in my picture.
The picture i have of that head has a couple key distinctions that still has me scratching my head. First is that mine doesn't have a set screw on the ring gear in the spindle. Second is, mine doesn't have screws that hold the top / bottom flanges on to provide preload to the bearings. I have circled these differences in my picture.