Marty,
Very interesting looking tool, thanks for the photos! Does the holder
locate the top of the vee on centre or above. It reminded me of a shearing
type tool, front straight across with rake, some back rake with the top
angled downwards from left to right, left corner above centre but it only
cuts at the intersection of centre. Supposed to give a very nice finish.
Before I face the joys of grinding of a cobalt HSS blank some more info
would be appreciated.
Jeff
PS: Standard jewellery photo technique for polished metal is a light
diffusion tent, AKA a white bed sheet or piece of paper between the light
and the metal. Diffused light = diffused reflections
* REPLY SEPARATOR *
On 4/7/2007 at 5:03 PM Clint D wrote:
The photos look well to me, good job on them, they are now uploaded to
Marty's Folder
Clint
Marty N wrote:
Okay John:
I sent a few snaps to Clint. This thing does not photograph well as it
is too shiny. A bit of candle black helped some pictures and hurt others.
Bottom and side views pretty good but the most important, top faceting,
drove me nutty in attempt.
Gadgetbuilder, man, I'm sorry :-( Total space city.
Marty
----- 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
>
-
Demand Designs
Analog/Digital Modelling & Goldsmithing
jdemand@...
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