wrote in message
oups.com...
A while back I was having problems with trying to turn 1018 on our old
B+S screw machine. I'm trying to change over to 1018 from 12L14 which
is quit a bit more expensive. I'm lookin for reconmendations as to
which oil to buy. In MSC they had the heavy duty and medium duty oil.
I'm making #6, #8 screws from 3/8 bar stock and have to turn the dia
back two inches.


I'd suggest a sulfur based oil, but you're not going to like turning 1018
after using 12L14, and it won't matter what you use for lubrication. .
Anything you save in material costs is going to come out of you in
frustration unless surface finish (tearing) isn't a concern.

You might be wise to investigate other free machining materials, such as
1117, or 11L17, especially if your purpose in abandoning 12L14 was to
improve on mechanical properties. Both of these grades can be carburized,
and are suited to screw machine application.

Harold