I have two 5/8" plates that will be 4" away from each other, parallel.
They will be identical. They will be held together with pieces of 4"x4"
heavy wall square tubing acting as spacers, and everything is assembled
with bolts. It's a tubing roller. There are two shafts, perpendicular
to the surface of the plate, and they need to be mounted with roller
bearings.

I need to put two holes in each plate that match perfectly and are the
exact size needed to press fit the bearings into. My best idea is to
tack the plates together, wouldn't that work?

And for the proper hole size, its going to need to be something like 2
5/16" and the closest I can get with a drill bit is 2". how do I get
the rest of the way without a milling machine?

Thanks for the help
- LP