Is there a logic/system behind the myriad of abbreviations of all these
inserts? It seems like you can put any 3-5 letters of the alphabet
together, and come up w/ an insert style--hundreds, at this point.
Also, the proliferation of styles/sizes seems to mean that 1. once you buy
a holder, you are locked into that insert style, like a car/car part--unless
it's a clamp-down; and 2. if that insert is no longer made, you now have
an obsolete holder.
The array is indeed dizzying...
formerly Droll Troll
As much as there is supposed to be a "Standard" for this, every
manufacturer has their own little variance to the scheme. Typically the
final designation of the insert has to do with and edge prep that is
not part of the standard. Or it might be they developed a new shape of
insert that wasn't thought of at the time the ancient standard was
scribed into the granite.
Shape, IC Size, Thickness, Side Clearance Angle, Ground or Molded
Tolerance, Chipbreaker, Edge Prep or Special Features are what these
Codes consist of.
It gets confusing when the IC Size is measured by 1/8" of inches, but
they also throw in 5/32". Corner Radius is measured by 1/64" until you
go sharper than 1/64" and they designate it by 08 or 04 standing for
.008" or .004". Thickness is all over the place. Then don't forget,
there is a METRIC Standard also. I like the metric sometimes. But it
strays off also.
Typically for side clearance the higher the letter is in the alphabet
the more clearance angle it is. A=3Deg, B=5Deg, C=7Deg, D=15Deg,
E=20Deg and so on until you see N=ODeg because N stands for Neutral. So
it gets confusing.
Then for the Tool Holder itself. There is some of the same concept
taken from the insert but then the clamp style, approach angle, shank
size and length comes into play. Then milling cutter bodies will
designate coarse or fine pitch, arbor size, number of inserts, etc..
Then BE CAREFUL as many of the manufacturers do nice little things like
make holders and inserts that have to be used together so as their
competition can't come walking in with an insert that looks very
similar but is now running .010 undercenter on a lathe, or doesn't
quite fit into the milling cutter body like it should so it immediately
fails and crashes your $400 facemill.
Ceratip makes a Swiss Style Turning holder that is capable of letting
you index the insert without taking the holder out of the Gang Slide
such as a Screw Type holder makes you do. But what they don't usually
tell you that most of their competition's inserts don't have the same
counterbore dimensions so their locking pin doesn't secure that insert
in place and fails quickly usually causing a wreck. So as soon as you
put the Ceratip insert back into this holder you have success AGAIN.
Keeps you using their insert. Don't get me wrong, Most Every Tool
Manufacturer has doen this type of trick. Carboloy used to make inserts
that were thicker than most everyone else Standard insert. When used
with their holder the centerline height was correct. Put in someone
else's insert and it wouldn't have a chance.
As a Tool Salesman you soon find yourself doing some honework, bringing
the holder and insert combo in to test. It's a little more work, but
success outweighs failure every time.
Every Insert Section of Tooling Catalogs try to show all of this stuff.
Mitsubishi has one of the best I refer to for the basics of it all.
Then there's threading, drilling, etc etc...... Good Luck