Lathe pass through

[Outlawcrewcab]

I just bought a Birmingham 14x40 lathe I was told I could put 1.50 stock through pass through. As that's my main size I'll be using. After getting it set up I measure it at 1.40. So 1 3/8 not the 1.50 I need. Was wonder what y'all think about using a boating bar and turn inside to 1.50-1.55 so I can use the pass through? Anyone done this?

[TheRodDoc]

Yes. I did A turret lathe for Chassis Engineering. Enlarged it .125" to 3"

I used a horizontal mill cutter on a heavy machined bar. Flooded with coolant, Used the carriage to feed it. Hit 2 hard spots and didn't think I was going to get through it. But after 5 new carbide cutters I made it through them. I guessed that it was hardened where the bearings were.

I have know idea if it hurt the accuracy of the lathe by relieving any stress on the tube. It didn't matter on this lathe for it was only used for tube threading and cutoff.