If you're going to do this kind of stuff you really need to be able to measure it.
Thread wires are way cheaper than a thread micrometer and very accurate as long as you do your part with correct form.
Dave?
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-------- Original message --------
From: Jody <jp4lsu@...>
Date: 1/8/19 18:16 (GMT-06:00)
Subject: Re: [atlas-craftsman IO] Internal Threading - Compound Setup
Thank you Dave & Guenther.
Dave thanks for the pics.?
For internal threading is this typically what you would use and run the lathe in FWD?
I guess this is the most intuitive way.? The only thing different from the external thread is the compound? swinging to opposite 30deg.? The lathe rotation and feed direction would be the same.
Initially when thinking about this I was reluctant to set the compound up this way because it seems odd from normal turning process I'm more used to.
But now it seems intuitive and the simplest.
To answer you're questions:
-I plan on making an external thread first and if I can use it as a test piece for my internal thread.
-I do not have thread wires
-I do have micrometers and telescoping gages for bore checking
-I will cut a relief/undercut at the base of the thread inside the bore.?
-I have a mighty mag for now with a dial indicator that I will use to monitor the depth
Thanks again for the pics and advice.
-Jody
