Thread Cutting on the Lathe, Part Two

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Thread Cutting on the Lathe, Part Two - Grinding the Tool

PixMan Offline

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Mayhem (08-04-2013)

08-03-2013, 10:11 PM (This post was last modified: 08-03-2013, 10:35 PM by PixMan.)

Tom,

I SO much prefer your videos over the BoobleCain ones. I find that guy to be so annoying, and often WRONG.

Now a question: A 1/32" flat on the tip of the tool would be for a 4 TPI thread. Is that what you are making for a thread with that tool?

The formula for the flat at the root of an ANSI "UN" thread is .125 x P, or at least that what I've always used.

Here's an online calculator which seems to use a tolerance on that root flat of external threads, showing .1875 x P to (my recommendation of) .125 x P.

http://theoreticalmachinist.com/Threads_...erial.aspx

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Messages In This Thread

Thread Cutting on the Lathe, Part Two - Grinding the Tool - by TomG - 07-28-2013, 08:41 PM

RE: Thread Cutting on the Lathe, Part Two - Grinding the Tool - by b4dyc - 07-29-2013, 08:23 AM

RE: Thread Cutting on the Lathe, Part Two - Grinding the Tool - by TomG - 07-29-2013, 08:33 AM

RE: Thread Cutting on the Lathe, Part Two - Grinding the Tool - by f350ca - 07-29-2013, 12:17 PM

RE: Thread Cutting on the Lathe, Part Two - Grinding the Tool - by TomG - 07-29-2013, 12:24 PM

RE: Thread Cutting on the Lathe, Part Two - Grinding the Tool - by DaveH - 08-02-2013, 11:28 AM

RE: Thread Cutting on the Lathe, Part Two - Grinding the Tool - by PixMan - 08-03-2013, 10:11 PM

RE: Thread Cutting on the Lathe, Part Two - Grinding the Tool - by TomG - 08-03-2013, 10:54 PM

RE: Thread Cutting on the Lathe, Part Two - Grinding the Tool - by TomG - 08-04-2013, 02:44 PM