Make a Drawbar from DOM Tube!

In this week's project, we start in on making our 5C draw-tube to go along with the 5C collet adapter that we made a few videos ago.
Machining a 5C Collet Adapter: https://rumble.com/v3s260q-machining-a-5c-collet-adapter-morse-taper-4-12-to-5c-adapter.html
We'll start with a piece of 1-3/8" DOM tube, cut it, bore it, and single point cut the internal thread on the manual lathe.
We will also go over some of the math required to find the nominal bore diameter of a given internal 60 degree V thread.
This can be useful when dealing with a "non standard" thread with unknown dimensions.
In the next video, we will finish up the project by casting and machining the hand wheel to fit onto the end of the draw-tube.

I just want to say a heartfelt THANK YOU, for all of the support that you all have shown me, and my channel.
This thing has already exceeded my wildest expectations, and we are just getting started!

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Who am I?
I'm a hobby machinist, with a passion for old machine tools and manual machining.
I am here to share and learn.
Being self taught, much of my limited knowledge, has come from others sharing their experiences online, just as I am doing now.
My hope, is that by putting my work in front of much more knowledgeable machinists, we can all learn something new together.

My Lathe: MSC / Prince 9517350 - 13x40 Manual Metal Lathe
My Milling Machine: Bridgeport Variable Speed Series 1 "J-Head"

CREDITS:
Music and Sound Effects courtesy of www.epidemicsound.com