Ahhh, the beauty of being a machinist....
Option #1: skip the tapping. From the top, drill and counter bore. Not the bset option in the world..
Option #2: Only the surface of thomson shafting is hardened. Once you get past it, it's only 30Rc of so.....
Option #3: Drill an oversized hole, and epoxy in a theaded insert. Hmmm, that might just work.....
I agree, the costs are much to high. Hopefully these options will provide lower costs for the DIY group....
On a side note: I ran 1" shafting on my previous router 36" long unsupported on the Y axis. There was very little (.0005) deflection. true, the gantry didn't weigh more than 35 pounds, but..... |