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----- Original Message -----
From: born4something
To: 7x12minilathe@...
Sent: Saturday, April 07, 2007 2:28 AM
Subject: [7x12minilathe] Re: Ammeter/Parting


Hi Marty,

You WILL be posting some nice close-up picks of that parting tool
and especially the business end, won't you?

John

--- In 7x12minilathe@..., "Marty N" <martyn@...> wrote:
>
>
> G'day Jim
>
> <snip>
> I am hoping the meter will be useful when parting off as I
frequently
> stall the lathe, even with a 1/16 blade. That is why I wanted it
at a
> place where I can see it when operating the cross slide. It
certainly
> confirmed I need to change out the horse power resistor; I got
short
> changed.
>
> Regards
> Ian
>
> Ian and All:
>
> Late last fall I bought a SB 10L that had a large box of tooling,
fixtures
> etc. Last night I was rummaging the larger box for the face plate
and ran
> across a shoe box sized container of boring and parting tooling.
Most of
> this looks to have never been used. On one of the boring bars was
engraved
> "Green 1924". I assume the person or shop that purchased the
tooling and
> date. Much of it is "micro" sized and appears to all be of the
same
> manufacture which I have yet to ascertain, but maybe not all the
same time
> period (packaging). One of the tools I can only imagine is a
parting tool
> and thus the snip from Ian's post.
>
> This tool doesn't even look like a tool but like a piece of fine
jewelry!
> I've never seen anything like it. All surfaces are as if you are
looking
> into a mirror they are that highly polished but it is the geometry
of the
> tool that is most intriguing. It is multi faceted like a gem
stone. "T" form
> parting blades or those ground from tool steel blanks "Plow" to
the center
> of the work with a bit of top and side relief curling the chip
straight back
> over the blade. This tool splits the chip or "curl" and directs it
by a
> complex set of angles away from a sinlge point of contact. Think
of a "V"
> form snow blade. The address must be critical as the matching
holder and the
> operator end of the tool only permit mounting to a "fixed" address
it seems.
>
> Point of this was that as I looked at this tool, and after the
amazement of
> the find disapated a bit, was that this shape would use very
little power to
> do a great deal of cutting. It would also apear this tool is
designed to
> part and face both faces of the parted stock in one operation!
>
> Anyway, I has me thinking that shape and address has more to do
with power
> requirement than just the brute force of plunging a square faced
tool into
> the stock. Now I wish I wouldn't have opened the package :(
>
> Marty
>