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On Tue, 1/8/19, Jody <jp4lsu@...> wrote:

Subject: Re: [atlas-craftsman IO] Internal Threading - Compound Setup
To: [email protected]
Date: Tuesday, January 8, 2019, 6:22 PM

Ok, I like
to hear that.Thanks for putting my mind at
ease.Would your method of internal threading on
the Atlas be to run it in reverse and have the feed go from
left to right, starting inside bore.and coming
out?
Thanks for the info.-Jody


-------- Original message --------
From: Guenther Paul <paulguenter@...>
Date: 1/8/19 5:02 PM (GMT-06:00)
To: [email protected]
Subject: Re: [atlas-craftsman IO] Internal Threading -
Compound Setup

Jody
In 54 years I had never had a threaded on chuck come loose.
Don't worry if you put the chuck on properly meaning
when you get to the last 1/4 turn you give it a hard spin so
you can hear a click the chuck is on it will not come loose

GP

--------------------------------------------
On Tue, 1/8/19, Jody <jp4lsu@...> wrote:

Subject: Re: [atlas-craftsman IO] Internal Threading -
Compound Setup
To: [email protected]
Date: Tuesday, January 8, 2019, 5:41 PM

Thanks
Andrei,I'm actually subscribed to his channel. He
is good and goes a bit fast for me sometimes.
This is his external thread video but he also has
an internal thread video.
If I remember correctly, he starts the cutter in
the bore, runs in reverse and the feed comes out of the
bore
from left to right.
I'm a little nervous doing it this way
because of the chuck on the Atlas being threaded
on.-Jody

-------- Original message --------
From: Andrei <calciu1@...>
Date: 1/8/19 1:40 PM (GMT-06:00)
To: [email protected]
Subject: Re: [atlas-craftsman IO] Internal Threading -
Compound Setup







Joe Pieczinski, a great YouTube machinist with loads of
skill has done that on a larger lathe, but it should work
just fine unless you are trying to take 3/8 DOC. Here is
the
vid.?




















Threading on a manual lathe
BEST TECHNIQUE EVER !!!!

A short demonstration of a different way to run a single
point thread on an engine lathe. This technique allows for
the use of a positive stop without the wo...

youtu.be













From:
[email protected]
<[email protected]>
on behalf of Jody <jp4lsu@...>

Sent: Tuesday, January 8, 2019 1:41 PM

To: [email protected]

Subject: [atlas-craftsman IO] Internal Threading -
Compound Setup
?

So I'm going to be doing some internal threading
here in the next week or so hopefully.?




initially I was thinking of running in reverse and start
the
cutting from down inside the bore and come out.?
Considering the chuck is threaded on, I'm rethinking
this.?


Although on a 1 1/2" bore, will the cutting forces
really be high enough with a 3/4" moment arm (from the
spindle axis) to unwind the chuck?? Probably not.?


I'd be curious if anybody has done this in reverse.?
Now if it was on a 4" ID, it would be a definite no
for
me to do it this way because the cutting forces would be
acting 2" away from the spindle axis and have a larger
moment arm to create higher torque to
unwind the chuck.



Anyway, being this is my 1st time doing threading, I
don't want to risk it so I will be staying in forward.



Question for running in forward direction:

What compound setup do you guys like to use??

????? -29-30 deg compound with compound axis pointing
away from head stock (backwards to how you would have it
for
turning)? I saw on Youtube "Tom's Techniques"
channel do this.

????? - Or set compound on 29 - 30 deg conventional
direction and flip cutter upside down and cut the back
side
feeding compound in with each pass.?




Thanks for any pointers and help,

Jody