You guys are the best! Thanks everyone for sharing. I like to study,
and this gives me lots of information to get going with.
--- In 7x12minilathe@..., "paul_probus" <paul_probus@...>
wrote:
The link to the "cheat sheet" I posted is far handier and easier to
follow, IMHO.
Paul
--- In 7x12minilathe@..., "Charles E. Kinzer"
<ckinzer@> wrote:
I think that Carbide Depot site is much handier than the first
one
I offered up. I think the magic page is
I also just tripped over this page called "Identification System
for Indexable Inserts" at:
which has a very nice description of things that gets into a lot of
fine detail. It's probably worth printing out and keeping handy
with the catalogs.
From the Carbide Depot site you provided, I took the data from
their drop down boxes that relates to the letters (like "TNMG") and
put it below in case anyone finds it helpful in this forum in this
form. Or in this form in this forum.
SHAPE:
A - 85 degree parallelogram
C - 80 degree diamond
D - 55 degree diamond
O - octagon
R - round
S - square
T - triangle
V - 35 degree diamond
W - 80 degree trigon
RELIEF ANGLE:
N - 0 degree relief angle
B - 5 degree relief angle
C - 7 degree relief angle
P - 11 degree relief angle
D - 15 degree relief angle
E - 20 degree relief angle
F - 25 degree relief angle
TOLERANCE:
A - .0002"/.001"/.001"
C - .0005"/.005"/.001"
E - .001"/.001"/.001"
G - .001"/.001"/.001"
K - .005"/.001"/.002"
M - molded tolerance
U - utility tolerance
STYLE:
- no hole/no chip breaker (no 4th letter)
A - straight hole/no chipbreaker
B - countersunk hole/no chipbreaker
E - no hole/no chipbreaker
F - no hole/2-sided chipbreaker
G - straight hole/2-sided chipbreaker
H - countersunk hole/1-sided chipbreaker
M - straight hole/1-sided chipbreaker
P - straight hole/hi positive chipbreaker
R - no hole/1-sided chipbreaker
S - straight hole/hi positive chipbreaker
T - countersunk hole/1-sided chipbreaker
W - countersunk hole/no chipbreaker
Z - straight hole/hi positive chipbreaker
The one duplication in the tolerance and the many duplications in
the styles are what was on the site and are not typos.
A cheat sheet really does make it easier to see the difference
between a TNMG and a TPG
Chuck K.
----- Original Message -----
From: roylowenthal
To: 7x12minilathe@...
Sent: Tuesday, March 06, 2007 6:27 PM
Subject: [SPAM] [7x12minilathe] Re: Carbide Insert Nomenclature?
Carbide Depot's site has a pretty good section on decoding the
insert
nomenclature. They frequently have some good deals on "surplus"
tooling. Not affiliated, just a satisfied customer.
Roy
--- In 7x12minilathe@..., "clypeaster55"
<clypeaster55@> wrote:
>
> I am going to build a ball/radius cutter similar to Bedair's
9X20
> design. Gadgetbuilder has one he made on his site as well. In
gathering
> the materials, it occured to me that I have no idea what to
ask for
or
> order when it comes to the carbide insert. Gadgetbuilder uses
a "TNMG"?
> insert, which he says needs a 5 degree titl, and Bedair's
doesn't
> specify. I know I want something that doesn't require an
angled
holder,
> since I would like to get a few of these to experiment with
(making
my
> own holders, thread tools, etc.). Keeps things nice and
simple
(for
me,
> that's a good thing!). I would however, like an insert that
would
be
> good for general use with a variety of metals (CS, 6061,
brass, and
the
> occaisional SS).
>
> So... my real question is, what do all these "Txxx"
designations
mean
> and where can I find a simple explanation of the types and
> nomenclature? Can you buy the screws they need together with
them?
> After looking around, I haven't had much luck. Besides, the
only "T"
> codes I know about is "TGIF", and I don't think that cuts
anything
but
> the end of the week! At least it only comes in one size
though!
>
> Any advice is MUCH appreciated.
>
[Non-text portions of this message have been removed]
