"Greg O" wrote in
:


"Rob McDonald" wrote in message
...
I hope somebody has the patience to read through this :-) I am trying to
include all the details because I don't know what I am doing wrong.


I recently tried to cut a 3/8-40 thread on a piece of 1018 HRS. First
pass was smooth. With later passes the surface seemed to get rough,



1018 HRS, that is your problem!
Greg



Can you expand upon that? What do you suggest?

Rob

--