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
