-------- 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