[grandville455]

Originally Posted by Wade Congdon

This is exactly correct. A straight reamer is the way to do this. (Carbide if possible) Best way is in a lathe with the reamer in the tailstock. If you know someone at a machine shop this would be a 5 minute deal for them.

Wade,
I do know someone at a shop, so just use a straight .500 one then? Or go smaller first?

[superdutybob]

I was a machinist in a former life. You're only talking about removing .009" total which is less than normally allowed to go from a drilling to a reamer. I would chuck it up in a small lathe and indicate it in so it's running true. Feed the .500 reamer in and it will be perfect. I wouldn't hesitate for 1 second to do it this way.

[Wade Congdon]

Originally Posted by superdutybob

I was a machinist in a former life. You're only talking about removing .009" total which is less than normally allowed to go from a drilling to a reamer. I would chuck it up in a small lathe and indicate it in so it's running true. Feed the .500 reamer in and it will be perfect. I wouldn't hesitate for 1 second to do it this way.

That is correct, We use a 4.998 but a .500 should work fine.