Subject: Polygonal Tool Post.

From: [email-masked] (Ian R. Howcroft)
Date: Sun, 22 Sep 1996 05:53:04 GMT

Many years ago, I saw a tool post which, I am sure, was called a
polygonal tool post, and  which was used - in that particular
situation  - to "Turn" the hexagonal head on some bolts used in a
fairly specialist application. I forget how it worked, but it was set
up on a lathe, and the bolt was chucked just above the thread.  When
the cut was set to the bolt head which was round at that time, the
tool moved backwards and forwards quite rapidly, and formed a hexagon
head on the bolt.  Obviously, the flats did have a small amount of
curviture, but the head was more than good enough for a ring spanner.
As we were the only people who ever positioned or removed the bolts,
there was never a problem with the wrong spanner being used.
I have mentioned this tool post to many people since I saw it in use
(over thirty years ago), and I have never met anyone who has heard of
or seen one of them.  Have any readers of this group come across them,
and if so, do you have any details on how they worked?
							Ian.

---

From: [email-masked] (Russ Kepler)
Date: Sun, 22 Sep 1996 22:35:52 GMT

In article <[email-masked]>,
>and if so, do you have any details on how they worked?

I've not seen details on this modification to a tool holder, but have
seen mention in a lot of places, particularly in cutting relief on
lathe cut mills and the like.  I don't think anything like this is
made anymore.

-- 
Russ Kepler							[email-masked]

                    Please Don't Feed the Engineers

---

From: [email-masked] (Steve Rayner)
Date: Mon, 23 Sep 1996 05:27:21 GMT

You could modify the Ureka form relieving tool ( George Thomas ) to do this.

In a previous article, [email-masked] (Ian R. Howcroft) says:

>o.iinet.net.au!demeter.omen.com.au!news
>From: [email-masked] (Ian R. Howcroft)
>Newsgroups: rec.crafts.metalworking
>Subject: Polygonal Tool Post.
>Date: Sun, 22 Sep 1996 05:53:04 GMT
>Organization: Omen Computer Services, Perth, Western Australia
>Lines: 18
>Message-ID: <[email-masked]>
>NNTP-Posting-Host: ttye8.faroc.com.au
>X-Newsreader: Forte Free Agent 1.0.82
>
>

-- 
Steve.

**************  BE ALERT, THE WORLD NEEDS MORE LERTS ************************